adjective

1. Differing from what is usual, ordinary or expected.

   “She slept in, which was very odd.”

2. Without a corresponding mate in a pair or set; unmatched; (of a pair or set) mismatched.

   “My cat Fluffy has odd eyes: one blue and one brown.”

3. Left over, remaining after the rest have been paired or grouped.

   “I'm the odd one out.”

Synonyms: mismatched, single, strange, unusual