Word.ws English Dictionary

ob-

ob- prefix: against; facing; a combining prefix found in verbs of Latin origin.

Prefix (1)

ob-

  1. (idiomatic) Against; facing; a combining prefix found in verbs of Latin origin.
    Synonyms:
    anti-, counter-, contra-, dys-
  2. Of a reversed shape.

Prefix (2)

ob-

  1. (Internet, humorous, informal) Obligatory; prepended to the name of a topic being mentioned to avoid accusations of being off-topic.
    • ObGoth: Uh, well, it's like this you see, <searches in random file o' obgoth things> anyone out there got the new CoX album on Tess? If so which album is it *most* like?1998, Haydn Black, “lesbian goths”, in alt.gothic (Usenet)
    • Aren't Newcastle's chairman Sunderland supporters? (From the way they acted?) Erm...obspeccy? Tynesoft, eh? What happened to them?1998, Peter Thomas, “FAQ: more info request”, in comp.sys.sinclair (Usenet)

Synonyms of ob-

Origin of ob-

From Latin ob-.

Clipping of obligatory.

Questions about ob-

What does ob- mean?
Ob- means against; facing; a combining prefix found in verbs of Latin origin.
What part of speech is ob-?
Ob- is a prefix.

Words near ob- in the dictionary

  1. Oaxtepec
  2. ob
  3. OB marker
  4. OB markers
  5. Ob'
  6. ob-
  7. ob-gyn
  8. OB-Gyne
  9. OB-Gynes
  10. ob-gyns
  11. Ob-Ugrian

Source and license

Adapted from Wiktionary: ob- (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “ob-.” Word.ws, https://word.ws/ob-. Based on Wiktionary, CC BY-SA 4.0.