(law) In the manner of a proceeding where multiple parties to a dispute are present.

(law) Of, relating to, or characteristic of a proceeding where multiple parties to a dispute are present.

plural of pars distalis

(idiomatic, intransitive, with "in") To participate or join. / (idiomatic) To share or partake. / (dated) To support or ally oneself (with).

(grammar) A linguistic category of words sharing syntactic or morphological behaviour and semantic properties, such as noun or verb.

(law) In the manner of a proceeding where one of the involved parties is not (or sometimes may not be) present.

(law) Of, relating to, or characteristic of a proceeding where one of the involved parties is not present. / Concerning only one side of a matter; one-sided.

Alternative spelling of part song

(music) A form of unaccompanied, often homophonic, vocal composition usually for a few voices or a small choir

In a piece of machinery with multiple parts, a part that is not powered to move.