Webster's Revised Unabridged Dictionary · 1913

Climber

Climber , noun

(Botany) One who, or that which, climbs
(a)
(Botany) A plant that climbs.
(b)
(Botany) A bird that climbs, as a woodpecker or a parrot.

Climber , intransitive verb

[From Climb; compare Clamber.]

To climb; to mount with effort; to clamber. [Obsolete] — Tusser