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WordReference Random House Learner's Dictionary of American English © 2024ob-, prefix. - ob- is attached to roots and means "toward,'' "to,'' "on,'' "over,'' "against'':object, obligate.
Collins Concise English Dictionary © HarperCollins Publishers:: ob- prefix - inverse or inversely: obovate
Etymology: 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 (ôb, ob; Russ. ôp),USA pronunciation n. - Place Namesa river in the W Russian Federation in Asia, flowing NW to the Gulf of Ob. 2500 mi. (4025 km) long.
- Place Names Gulf of, an inlet of the Arctic Ocean. ab. 500 mi. (800 km) long.
OB, - PathologyAlso, ob [Med.]
- obstetrical.
- obstetrician.
- obstetrics.
- Show Businessoff Broadway.
- opening of books.
- ordered back.
ob-, - a prefix meaning "toward,'' "to,'' "on,'' "over,'' "against,'' orig. 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-. - Neo-Latin, Latin ob-
- Latin, representing ob (preposition); in some scientific terms,
- Old French)
- Middle English (
- he died;
she died. - incidentally.
- oboe.
- Meteorologyobservation.
O.B., - opening of books.
- ordered back.
Also, O/B
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