Wordnet 3.0
NOUN (1)
1.
a short and simple sonata;
The Collaborative International Dictionary of English v.0.48:
Sonatina \So`na*ti"na\, n. [It.] (Mus.)
A short and simple sonata.
[1913 Webster] Soncy
WordNet (r) 3.0 (2006):
sonatina
n 1: a short and simple sonata