/ Dictionary / Index L long arm: Meaning and Definition of Find definitions for: long' arm" Pronunciation: [key] a long pole fitted with any of various devices, as a hook or clamp, for performing tasks otherwise out of reach. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. longanimity long barrow Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language