1. (of plants) growing together in groups that are not close together;
2. (of animals) not gregarious;
3. not disposed to seek company; - Example: "a lonely ungregarious person"
WordNet (r) 3.0 (2006):
ungregarious
adj 1: (of plants) growing together in groups that are not close
together [ant: gregarious]
2: (of animals) not gregarious [ant: gregarious]
3: not disposed to seek company; "a lonely ungregarious person"