Webster’s Revised Unabridged Dictionary · 1913 Outmost Out′most′ (·mōst′), a. [OE. outemest, utmest, AS. ūtemest, a superl. fr. ūte out. See Out, Utmost, and cf. Outermost.] Farthest from the middle or interior; farthest outward; outermost. ‹ Outmeasure Outmount ›