adjective, heavier, heaviest.
of great weight; hard to lift or carry: a heavy load.
of great amount, quantity, or size; extremely large; massive: a heavy vote; a heavy snowfall.
of great force, intensity, turbulence, etc.: a heavy sea.
of more than the usual or average weight: a heavy person; heavy freight.
having much weight in proportion to bulk; being of high specific gravity: a heavy metal.
of major import; grave; serious: a heavy offense.
deep or intense; profound: a heavy thinker; heavy slumber.
thickly armed or equipped with guns of large size. Compare heavy cruiser.
(of guns) of the more powerful sizes: heavy weapons. Compare heavy artillery.
hard to bear; burdensome; harsh; oppressive: heavy taxes.
hard to cope with; trying; difficult: a heavy task.
being as indicated to an unusually great degree: a heavy buyer.
broad, thick, or coarse; not delicate: heavy lines drawn in charcoal.
weighted or laden: air heavy with moisture.
fraught; loaded; charged: words heavy with meaning.
depressed with trouble or sorrow; showing sorrow; sad: a heavy heart.
without vivacity or interest; ponderous; dull: a heavy style.
slow in movement or action; clumsy: a heavy walk.
loud and deep; sonorous: a heavy sound.
(of the sky) overcast or cloudy.
exceptionally dense in substance; insufficiently raised or leavened; thick: heavy doughnuts.
(of food) not easily digested.
being in a state of advanced pregnancy; nearing childbirth: heavy with child; heavy with young.
having a large capacity, capable of doing rough work, or having a large output: a heavy truck.
producing or refining basic materials, as steel or coal, used in manufacturing: heavy industry.
sober, serious, or somber: a heavy part in a drama.
Chemistry. of or pertaining to an isotope of greater than normal atomic weight, as heavy hydrogen or heavy oxygen, or to a compound containing such an element, as heavy water.
very good; excellent.
very serious or important: a really heavy relationship.
noun, plural heavies.
a somber or ennobled theatrical role or character: Iago is the heavy in Othello.
the theatrical role of a villain.
an actor who plays a theatrical heavy.
Military. a gun of great weight or large caliber.
Slang. a very important or influential person: a reception for government heavies.

before 900; Middle English hevi, Old English hefig, equivalent to hef(e) weight (akin to heave) + -ig -y1

heaviness, noun
overheaviness, noun
overheavy, adjective
ultraheavy, adjective
unheaviness, noun
unheavy, adjective

1. ponderous, massive, weighty. 5. dense. 9. onerous, grievous, cumbersome; difficult, severe. 14. Heavy, momentous, weighty refer to anything having a considerable amount of figurative weight. Heavy suggests the carrying of a figurative burden: words heavy with menace. Momentous emphasizes the idea of great and usually serious consequences: a momentous occasion, statement. Weighty seldom used literally, refers to something heavy with importance, often concerned with public affairs, which may require deliberation and careful judgment: a weighty matter, problem. 15. gloomy, mournful, dejected, despondent, downcast, downhearted. 16. tedious, tiresome, wearisome, burdensome, boring. 17. sluggish, lumbering. 19. lowering, gloomy.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
heavy (ˈhɛvɪ)
adj , heavier, heaviest
1.  of comparatively great weight: a heavy stone
2.  having a relatively high density: lead is a heavy metal
3.  great in yield, quality, or quantity: heavy rain; heavy traffic
4.  great or considerable: heavy emphasis
5.  hard to bear, accomplish, or fulfil: heavy demands
6.  sad or dejected in spirit or mood: heavy at heart
7.  coarse or broad: a heavy line; heavy features
8.  (of soil) having a high clay content; cloggy
9.  solid or fat: heavy legs
10.  Compare light (of an industry) engaged in the large-scale complex manufacture of capital goods or extraction of raw materials
11.  serious; grave
12.  military
 a.  armed or equipped with large weapons, armour, etc
 b.  (of guns, etc) of a large and powerful type
13.  Compare light (of a syllable) having stress or accentuation
14.  dull and uninteresting: a heavy style
15.  prodigious: a heavy drinker
16.  (of cakes, bread, etc) insufficiently leavened
17.  deep and loud: a heavy thud
18.  of music, literature, etc
 a.  dramatic and powerful; grandiose
 b.  not immediately comprehensible or appealing
19.  slang
 a.  unpleasant or tedious
 b.  wonderful
 c.  (of rock music) having a powerful beat; hard
20.  weighted; burdened: heavy with child
21.  clumsy and slow: heavy going
22.  permeating: a heavy smell
23.  cloudy or overcast, esp threatening rain: heavy skies
24.  not easily digestible: a heavy meal
25.  (of an element or compound) being or containing an isotope with greater atomic weight than that of the naturally occurring element: heavy hydrogen; heavy water
26.  horse racing (of the going on a racecourse) soft and muddy
27.  slang using, or prepared to use, violence or brutality: the heavy mob
28.  informal heavy on using large quantities of: this car is heavy on petrol
n , heavier, heaviest, heavies
29.  a.  a villainous role
 b.  an actor who plays such a part
30.  military
 a.  a large fleet unit, esp an aircraft carrier or battleship
 b.  a large calibre or weighty piece of artillery
31.  informal (usually plural) the heavies a serious newspaper: the Sunday heavies
32.  informal a heavyweight boxer, wrestler, etc
33.  slang a man hired to threaten violence or deter others by his presence
34.  (Scot) strong bitter beer
35.  a.  in a heavy manner; heavily: time hangs heavy
 b.  (in combination): heavy-laden
[Old English hefig; related to hebban to heave, Old High German hebīg]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. hefig, from P.Gmc. *khabigas (cf. O.N. hebig, O.N. hofugr), from *kafjanan and thus related to heave (q.v.). Theatrical (noun) sense of "villain" is 1880, from the adj. Jazz slang sense of "profound, serious" is from 1937. Heavy-handed was originally (1633) "weary" or "clumsy," sense of "overbearing"
is first recorded 1883. Heavyweight is 1857, of horses, 1877 of fighters.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Idioms & Phrases


In addition to the idioms beginning with heavy, also see hot and heavy; make heavy weather of; play the heavy; time hangs heavy.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
When you hoist two items of equal weight, your brain may be doing some heavy
Many governments are facing not only slow economic growth but also big deficits
  and heavy debts.
And the life-changing potential in small communities is different from that in
  large or tourist-heavy cities.
The southern coast is subject to late summer typhoons that bring strong winds
  and heavy rains.
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