[f. CONCLUDE v. + -ER1.] One who or that which concludes, in various senses of the verb.
1601. Cornwallyes, Ess., II. xlv. (1631), 249. Death
that concluder of mortalitie.
1738. Warburton, Div. Legat., App. 45. Such a Concluder would have made Aristotle himself forswear syllogism.