follow Dictionary.com

Your favorite word could be our Word of the Day!

Ob

[awb, ob; Russian awp] /ɔb, ɒb; Russian ɔp/
noun
1.
a river in the W Russian Federation in Asia, flowing NW to the Gulf of Ob. 2500 miles (4025 km) long.
2.
Gulf of, an inlet of the Arctic Ocean. About 500 miles (800 km) long.

OB

1.
Also, ob . Medicine/Medical.
  1. obstetrical.
  2. obstetrician.
  3. obstetrics.
2.
off Broadway.
3.
opening of books.
4.
ordered back.

ob-

1.
a prefix meaning “toward,” “to,” “on,” “over,” “against,” originally occurring in loanwords from Latin, but now used also, with the sense of “reversely,” “inversely,” to form Neo-Latin and English scientific terms: object; obligate; oblanceolate.
Also, o-, oc-, of-, op-.
Origin
Middle English (< Old French) < Latin, representing ob (preposition); in some scientific terms, < Neo-Latin, Latin ob-

ob.1

1.
he died; she died.
Origin
< Latin obiit

ob.2

Origin
< Latin obiter

ob.3

1.
oboe.
2.
Meteorology, observation.

O.B.

1.
opening of books.
2.
ordered back.
Also, O/B.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for Ob

Ob

/Russian ɔpj/
noun
1.
a river in N central Russia, formed at Bisk by the confluence of the Biya and Katun Rivers and flowing generally north to the Gulf of Ob (an inlet of the Arctic Ocean): one of the largest rivers in the world, with a drainage basin of about 2 930 000 sq km (1 131 000 sq miles). Length: 3682 km (2287 miles)

OB

abbreviation (Brit)
1.
Old Boy
2.
outside broadcast

ob-

prefix
1.
inverse or inversely: obovate
Word Origin
from Old French, from Latin ob. In compound words of Latin origin, ob- (and oc-, of-, op-) indicates: to, towards (object); against (oppose); away from (obsolete); before (obstetric); down, over (obtect); for the sake of (obsecrate); and is used as an intensifier (oblong)

ob.

abbreviation
1.
(on tombstones) obiit
2.
obiter
3.
oboe
Word Origin
(for sense 1) Latin: he (or she) died; (for sense 2) Latin: incidentally; in passing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for Ob

ob-

prefix meaning "toward, against, across, down," also used as an intensive, from Latin ob "toward, to, over against, in the way of, by reason of, about, before, in front of," from PIE root *epi, also *opi "near, against" (see epi-).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Ob in Medicine

OB abbr.
obstetrics

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Related Abbreviations for Ob

ob

obvious

OB

  1. obstetric
  2. obstetrics
  3. obstetrician
  4. off Broadway

ob.

  1. Latin obiit (he or she died)
  2. Latin obiter (incidentally)
  3. oboe

Ob.

Obadiah
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for Ob

Some English speakers likely know this word

Word Value for Ob

0
0
Scrabble Words With Friends

Quotes with Ob

Nearby words for ob