adjective

1. of only one person, thing, group, country, etc.; distinctive; exclusive
2. particular; unique; special a matter of peculiar interest
3. out of the ordinary; queer; odd; strange

Etymology: ME peculier < L peculiaris < peculium: see peculate

noun

1. something belonging to one only, as a privilege
2. Brit. a church or parish under a jurisdiction other than that of the diocese in which it is located