Wordnet 3.0
NOUN (1)
1.
a philosopher who subscribes to empiricism;
The Collaborative International Dictionary of English v.0.48:
Empiricist \Em*pir"i*cist\, n.
An empiric.
[1913 Webster]
WordNet (r) 3.0 (2006):
empiricist
n 1: a philosopher who subscribes to empiricism