OB

おーびー
noun
male alumnus; male graduate
academiceducationsociety
1. male alumnus; male graduate
A male former member of a school, club, or organization. From English 'old boy', a British term for male alumni.
OBが来校(らいこう)した。
Alumni visited the school.
野球部(やきゅうぶ)のOBが指導(しどう)に来(き)た。
Baseball club alumni came to coach.
OB会(かい)に参加(さんか)した。
I attended the alumni association meeting.

Etymology

Abbreviation of English 'old boy', a British term for male alumni. Adopted in Japan primarily for school and club contexts.

Usage

Commonly used for:

  • School alumni (especially sports clubs)
  • Company former employees
  • Organization former members

Gender note

OB is specifically for males. The female equivalent is OG ('old girl').

Compounds

  • OB会(かい) - alumni association
  • OB戦(せん) - alumni game/match
  • OB訪問(ほうもん) - visiting alumni (for job hunting advice)

Related words

  • OG - female alumna

Related Words

Related: OG (female equivalent)
general
Added 2026.1.21 9:23 · Revised 2026.9.2 13:01
07500/07715_oobii