Definitions
1.NounA period during which one is seated for a specific purpose."Due to the sheer volume of guests, we had to have two sittings for the meal.; The Queen had three sittings for her portrait."
2.NounA seance or other session with a medium or fortuneteller.
3.NounA special seat allotted to a seat-holder, at church, etc.
4.NounThe part of the year in which judicial business is transacted.
5.NounA legislative session (in the sense of meeting, and not period).
6.NounThe incubation of eggs by a bird.
7.NounA clutch of eggs laid by a brooding bird."we have thirty-four chicks from eight sittings of eggs"
8.NounAn uninterrupted application to anything for a time; the period during which one continues at anything."I read it in two sittings."
9.Verbpresent participle and gerund of sit
10.AdjectiveExecuted from a sitting position.
11.AdjectiveOccupying a specific official or legal position; incumbent.