The adj peculiar has 4 senses (first 2 from tagged texts)
1. (9) curious, funny, odd, peculiar, queer, rum, rummy, singular -- (beyond or deviating from the usual or expected; "a curious hybrid accent"; "her speech has a funny twang"; "they have some funny ideas about war"; "had an odd name"; "the peculiar aromatic odor of cloves"; "something definitely queer about this town"; "what a rum fellow"; "singular behavior")
2. (7) particular, peculiar, special -- (unique or specific to a person or thing or category; "the particular demands of the job"; "has a particular preference for Chinese art"; "a peculiar bond of sympathy between them"; "an expression peculiar to Canadians"; "rights peculiar to the rich"; "the special features of a computer"; "my own special chair")
3. peculiar -- (markedly different from the usual; "a peculiar hobby of stuffing and mounting bats"; "a man...feels it a peculiar insult to be taunted with cowardice by a woman"-Virginia Woolf)
4. peculiar -- (characteristic of one only; distinctive or special; "the peculiar character of the Government of the U.S."- R.B.Taney)