[ˏinstru'mentәlizәm,ˏinstrә-]
n.
[哲]工具主义

[ noun ]
a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success
<noun.cognition>

Instrumentalism \In`stru*men"tal*ism\, n. (Philos.)
The view that the sanction of truth is its utility, or that
truth is genuine only in so far as it is a valuable
instrument. -- {In`stru*men"tal*ist}, n.

Instrumentalism views truth as simply the value
belonging to certain ideas in so far as these ideas are
biological functions of our organisms, and
psychological functions whereby we direct our choices
and attain our successes. --Josiah
Royce.
[Webster 1913 Suppl.]