adjective.characteristic of only one person, group, or thing: distinctive

• … a drowsy fervour of manner and tone which was quite peculiar to her.
• a matter of peculiar interest

adjective.different from the usual or normal:

• It seems peculiar that she would leave town without telling anybody.
• The play had a zany plot and very peculiar characters.

adjective.special, particular

noun.something exempt from ordinary jurisdiction; especially: a church or parish exempt from the jurisdiction of the ordinary in whose territory it lies