Learner's definition of PECULIAR
[more peculiar; most peculiar]
not usual or normal
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.
not used before a noun
of, relating to, or found in (only one person, thing, or place)
The movie has a peculiarly [=distinctively, uniquely, particularly] American quality.
He's been behaving peculiarly. [=(more commonly) strangely, oddly]