(more peculiar; most peculiar)
1 : not usual or normal : STRANGE
It seems peculiar that he would leave town and not tell anybody.
The dog’s peculiar behavior worried them.
She got a peculiar feeling when the phone rang.
She had a peculiar expression on her face.
2 : not used before a noun, British, informal : not well : somewhat ill
He’s feeling peculiar.
peculiar to
of, relating to, or found in (only one person, thing, or place)
a custom peculiar to America (=a custom that is found only in America)
– peculiarly adverb
The movie has a peculiarly (=distinctively, uniquely, particularly) American quality.
He’s been behaving peculiarly. (=(more commonly) strangely, oddly)