Entry 3 senses · 2 variants Webster, 1913 Preservatory · Pre·serv·a·to·ry · IPA a. n. 01 a. Preservative. 1. Preservative. 02 n. A preservative. pl. Preservatories 1. A preservative.[Obs.] 2. A room, or apparatus, in which perishable things, as fruit, vegetables, etc., can be preserved without decay.