/ Dictionary / Index L Los Alamos: Meaning and Definition of Find definitions for: Los Al•a•mos Pronunciation: (lôs al'u-mōs", los), [key] a town in central New Mexico: atomic research center. 11,039. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Los Alamitos Los Altos Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language