Ob: Meaning and Definition of


Pronunciation: (ôb, ob Russ. ôp), [key]
  1. a river in the W Russian Federation in Asia, flowing NW to the Gulf of Ob. 2500 mi. (4025 km) long.
  2. an inlet of the Arctic Ocean. ab. 500 mi. (800 km) long.


Pronunciation: [key]
    1. obstetrical.
    2. obstetrician.
    3. obstetrics.
  1. off Broadway.
  2. opening of books.
  3. ordered back.


Pronunciation: [key]
  1. 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.


Pronunciation: [key]
  1. he died; she died.
  2. incidentally.
  3. oboe.
  4. observation.


Pronunciation: [key]
  1. opening of books.
  2. ordered back.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
  • ob (Thesaurus)