‖n. [ L., they sat, fr. sedere to sit. ] A sitting, as of a court or other body. [ 1913 Webster ]

'T is pity we have not Burns's own account of that long sederunt. Prof. Wilson. [ 1913 Webster ]

Acts of sederunt (Scots Law), ordinances of the Court of Session for the ordering of processes and expediting of justice. Bell. [ 1913 Webster ]