A command found in various unices that lists all man pages related to a certain keyword. Very useful when you know what you want to do, but don't know what program does it.

Ap"ro*pos` (#), a. & adv. [F. propos; (L. ad) + propos purpose, L. proposium plan, purpose, fr. proponere to propose. See Propound.]

1.

Opportunely or opportune; seasonably or seasonable.

A tale extremely apropos. Pope.

2.

By the way; to the purpose; suitably to the place or subject; -- a word used to introduce an incidental observation, suited to the occasion, though not strictly belonging to the narration.

 

© Webster 1913.