Noah Webster's Dictionary 1. (a.) Not tense, firm, or rigid; loose; slack; as, a lax bandage; a lax standard of discipline; lax fiber. 2. (v. t.) Not strict or stringent; not exact; loose; weak; vague; equivocal. 3. (v. t.) Having a looseness of the bowels; diarrheal. 4. (n.) A looseness; diarrhea.

Multi-Version Concordance Lax (1 Occurrence) Jeremiah 48:10 Cursed is he who does the work of Yahweh negligently; and cursed is he who keeps back his sword from blood. (See NIV)