Meaning of ob- in English:


Pronunciation /ɒb/


  • 1Denoting exposure or openness.

    • ‘obverse’
    1. 1.1Expressing meeting or facing.
      • ‘occasion’
  • 2Denoting opposition, hostility, or resistance.

    • ‘opponent’
    1. 2.1Denoting hindrance, blocking, or concealment.
      • ‘obviate’
  • 3Denoting finality or completeness.

    • ‘obsolete’
  • 4(in modern technical words) in a direction or manner contrary to the usual; inversely.

    • ‘obconical’


Ob- occurs mainly in words of Latin origin; it is also found assimilated in the following forms: oc- before c; of- before f; op- before p


From Latin ob ‘towards, against, in the way of’.