concluder|kənˈkluːdə(r)| [f. conclude v. + -er1.] One who or that which concludes, in various senses of the verb. 1601Cornwallyes Ess. ii. xlv. (1631) 249 Death..that concluder of mortalitie.1738Warburton Div. Legat.App. 45 Such a Concluder would have made Aristotle himself forswear syllogism.