m. leaf


Munro [muhn-roh] , 1905–76, U.S. author and illustrator of books for children.
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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World English Dictionary
leaf (liːf)
n , pl leaves
1.  the main organ of photosynthesis and transpiration in higher plants, usually consisting of a flat green blade attached to the stem directly or by a stalkRelated: foliar, foliate
2.  foliage collectively
3.  in leaf (of shrubs, trees, etc) having a full complement of foliage leaves
4.  one of the sheets of paper in a book
5.  a hinged, sliding, or detachable part, such as an extension to a table
6.  metal in the form of a very thin flexible sheet: gold leaf
7.  a foil or thin strip of metal in a composite material; lamina
8.  short for leaf spring
9.  the inner or outer wall of a cavity wall
10.  a crop that is harvested in the form of leaves
11.  a metal strip forming one of the laminations in a leaf spring
12.  a slang word for marijuana
13.  take a leaf out of someone's book, take a leaf from someone's book to imitate someone, esp in one particular course of action
14.  turn over a new leaf to begin a new and improved course of behaviour
vb (when intr, usually foll by through)
15.  to turn (through pages, sheets, etc) cursorily
16.  (intr) (of plants) to produce leaves
Related: foliar, foliate
[Old English; related to Gothic laufs, Icelandic lauf]

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. leaf "leaf of a plant, page of a book," from P.Gmc. *laubaz (cf. O.S. lof, O.N. lauf, O.Fris. laf, Du. loof, O.H.G. loub, Ger. Laub, Goth. lauf), perhaps from PIE *leup- "to peel off, break off" (cf. Lith. luobas, O.C.S. lubu "bark, rind"). Extended 15c. to very thin sheets of metal (esp. gold).
Meaning "hinged flap on the side of a table" is from 1550s. The verb meaning "to turn over (the pages of a book)" is from 1660s; the sense of a book page is that in the phrase to turn over a (new) leaf (1570s).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
leaf   (lēf)  Pronunciation Key 

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An appendage growing from the stem of a plant. Leaves are extremely variable in form and function according to species. For example, the needles of pine trees, the spines of cacti, and the bright red parts of the poinsettia plant are all leaves modified for different purposes. However, most leaves are flat and green and adapted to capturing sunlight and carbon dioxide for photosynthesis. They consist of an outer tissue layer (the epidermis) through which water and gases are exchanged, a spongy inner layer of cells that contain chloroplasts, and veins that supply water and minerals and carry out food. Some leaves are simple, while others are compound, consisting of multiple leaflets. The flat part of the leaf, the blade, is often attached to the stem by a leafstalk.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Bible Dictionary

Leaf definition

of a tree. The olive-leaf mentioned Gen. 8:11. The barren fig-tree had nothing but leaves (Matt. 21:19; Mark 11:13). The oak-leaf is mentioned Isa. 1:30; 6:13. There are numerous allusions to leaves, their flourishing, their decay, and their restoration (Lev. 26:36; Isa. 34:4; Jer. 8:13; Dan. 4:12, 14, 21; Mark 11:13; 13:28). The fresh leaf is a symbol of prosperity (Ps. 1:3; Jer. 17:8; Ezek. 47:12); the faded, of decay (Job 13:25; Isa. 1:30; 64:6; Jer. 8:13). Leaf of a door (1 Kings 6:34), the valve of a folding door. Leaf of a book (Jer. 36:23), perhaps a fold of a roll.

Easton's 1897 Bible Dictionary
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