Usually means: Prefix meaning against, toward, or before.
Definitions Related words Phrases Mentions History
We found 54 dictionaries that define the word OB:

General (25 matching dictionaries)
  1. OB, Ob, Ob, ob, ob-: Merriam-Webster
  2. OB, Ob, ob, ob-: Oxford Learner's Dictionaries
  3. OB, Ob, Ob, ob, ob-: American Heritage Dictionary of the English Language
  4. Ob, ob, ob-: Collins English Dictionary
  5. OB, Ob: Vocabulary.com
  6. O'B, OB, Ob, ob, ob-, oB: Wordnik
  7. OB, ob: Cambridge Advanced Learner's Dictionary
  8. OB, Ob, ob, ob-: Wiktionary
  9. Ob, ob, ob-: Webster's New World College Dictionary, 4th Ed.
  10. ob-: The Wordsmyth English Dictionary-Thesaurus
  11. Ob: Infoplease Dictionary
  12. Ob-, o.b, ob, ob: Dictionary.com
  13. ob-: Online Etymology Dictionary
  14. ob: Cambridge Essential American English Dictionary
  15. O.B, O.B. (Hollyoaks), OB, O.b. (brand), Ob (disambiguation), Ob: Wikipedia, the Free Encyclopedia
  16. Ob-: Online Plain Text English Dictionary
  17. ob-: Webster's Revised Unabridged, 1913 Edition
  18. Ob: Rhymezone
  19. Ob-, ob: AllWords.com Multi-Lingual Dictionary
  20. ob: Webster's 1828 Dictionary
  21. ob, ob-: MyWord.info
  22. OB, Ob-: Stammtisch Beau Fleuve Acronyms
  23. ob, ob-: FreeDictionary.org
  24. ob: Mnemonic Dictionary
  25. Ob, Ob, ob-: TheFreeDictionary.com

Art (2 matching dictionaries)
  1. ob-: A Cross Reference of Latin and Greek Elements
  2. Glossary of Stamp Collecting Terms (No longer online)

Business (1 matching dictionary)
  1. OB: Financial dictionary

Computing (3 matching dictionaries)
  1. Ob-: Free On-line Dictionary of Computing
  2. OB: Netlingo
  3. Ob-, Ob, Ob: Encyclopedia

Medicine (7 matching dictionaries)
  1. OB: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. OB: MedTerms.com Medical Dictionary
  4. OB: MedFriendly Glossary
  5. online medical dictionary (No longer online)
  6. OB, ob-: Medical dictionary
  7. OB: Drug Medical Dictionary

Miscellaneous (4 matching dictionaries)
  1. O.B, O.B, O.B, ob, ob, ob: Terminology and Descriptions of Geneaological Words
  2. OB, ob: Genealogy Glossary
  3. OB, o.b: Acronym Finder
  4. AbbreviationZ (No longer online)

Science (7 matching dictionaries)
  1. ob: Dictionary of Botanical Epithets
  2. Botanical Terms (No longer online)
  3. OB: Extragalactic Astronomy
  4. Flora of New South Wales (No longer online)
  5. ob: Cytokines & Cells Online Pathfinder Encyclopaedia
  6. Glossary of Roots of Botanical Names (No longer online)
  7. FOLDOP - Free On Line Dictionary Of Philosophy (No longer online)

Slang (2 matching dictionaries)
  1. ob: Green’s Dictionary of Slang
  2. O.B, O.B, Ob, Ob, the OB: Urban Dictionary

Tech (3 matching dictionaries)
  1. Basics of Space Flight Glossary (No longer online)
  2. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
  3. Glossary of Meteorology (No longer online)

(Note: See obing as well.)

Google, News, Images, Wikipedia, Reddit, BlueSky
Definitions from Wiktionary (OB)

▸ noun:  (historical) a halfpenny
▸ noun:  (archaic) an objection
▸ noun:  (genetics) the obese gene
▸ noun:  (meteorology) observation
▸ noun:  A river in Russia; the westernmost of the three great Siberian rivers.
▸ noun:  (sports) Initialism of Olympic best.
▸ noun:  (television, radio) Initialism of outside broadcast.
▸ noun:  (television, radio) Initialism of outside broadcasting.
▸ noun:  Initialism of old boy. (a male graduate; also a CB radio operator's term of address for a male) [(chiefly British) An alumnus, especially of a public school.]
▸ noun:  Abbreviation of obstetrician. [(medicine) A physician who specializes in childbirth.]
▸ noun:  Abbreviation of obstetrics. [(medicine) The care of women during and after pregnancy.]
▸ noun:  Abbreviation of Old Babylonian. [The historical period of the First Babylonian Dynasty.]
▸ adjective:  Abbreviation of obstetric. [Of or relating to obstetrics (the care of women during and after pregnancy).]
▸ adjective:  (golf) Initialism of out of bounds.
▸ adjective:  Abbreviation of obligatory. (as in "ob. link" on Usenet) (see ObLink at c2.com; see also ob-) [Imposing obligation, legally, morally, or otherwise; binding; mandatory.]
▸ adjective:  Abbreviation of Old Babylonian.

Similar:
ob river, doc, amnio, Asia, Dixie, irtish, irtish river, Irtysh, irtysh river, Novosibirsk, more...

Opposite:
ab-, anti-, contra-, counter-

Phrases:
ob gyn, ob river, Gulf of Ob, bay of ob, river ob, more...
▸ Word origin

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▸ Usage examples for OB

▸ Idioms related to OB

▸ Wikipedia articles (New!)

▸ Popular adjectives describing OB

▸ Popular nouns described by OB

▸ Words that often appear near OB

▸ Rhymes of OB

▸ Invented words related to OB

Similar:
ob river, doc, amnio, Asia, Dixie, irtish, irtish river, Irtysh, irtysh river, Novosibirsk, more...

Opposite:
ab-, anti-, contra-, counter-

Phrases:
ob gyn, ob river, Gulf of Ob, bay of ob, river ob, ob gyns, ob association, ob od, ob ugrian, ob ugric, Rothenburg ob der Tauber, OB marker, OB West, Bedford OB, test done by an ob, more...



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