adj. 1 infinite; without end; eternal. 2 continual, incessant (tired of their endless complaints). 3 colloq. innumerable. 4 (of a belt, chain, etc.) having the ends joined for continuous action over wheels etc. endless screw a short length of screw revolving to turn a cog-wheel. endlessly adv. endlessness n.
[ OE endeleas (as END, -LESS) ]