Trĭm1, a.
a. [compar. TRIMMER; superl. TRIMMEST.] [A-S. trum, firm, strong, O. Sax. trimm. See infra.] Fitly adjusted; being in good order, or made ready for service or use; firm; compact; snug; neat; fair; as, the ship is trim, or trim built; every thing about the man is trim: a person is trim when his body is well shaped and firm; his dress is trim when it fits closely to his body, and appears tight and snug; a man or a soldier is trim when he stands erect. “With comely carriage of her countenance trim.” Spenser.
So deemed I till I viewed their trim array Of boats last night. Trench.