Wordnet 3.0
NOUN (1)
1.
the side or slope of a hill;
The Collaborative International Dictionary of English v.0.48:
Hillside \Hill"side`\, n.
The side or declivity of a hill.
[1913 Webster]
WordNet (r) 3.0 (2006):
hillside
n 1: the side or slope of a hill