(1):

(n.) Particularity.

(2):

(n.) A particular or peculiar case.

(3):

(n.) A contract or obligation under seal; a contract by deed; a writing, under seal, given as security for a debt particularly specified.

(4):

(n.) That for which a person is distinguished, in which he is specially versed, or which he makes an object of special attention; a speciality.