1. Markedly different from the usual; special
   "a peculiar hobby of stuffing and mounting bats"; "a man … feels it a peculiar insult to be taunted with cowardice by a woman"
    
2. Beyond or deviating from the usual or expected
   "the peculiar aromatic odour of cloves";
   - curious, funny, odd, queer, rum [Brit, informal], rummy [Brit, archaic, informal], singular
    
3. Unique or specific to a person or thing or category
   "a peculiar bond of sympathy between them"; "an expression peculiar to Canadians"; "rights peculiar to the rich";
   - particular, special
    
4. Characteristic of one only; distinctive or special
   "the peculiar character of the Government of the U.S"

See also: characteristic, oddball, specific, strange, unordinary, unusual

Encyclopedia: Peculiar, Missouri