/ Dictionary / Index U Unalaska: Meaning and Definition of Find definitions for: U•na•las•ka Pronunciation: ("nu-las'ku, un"u-las'-), [key] — n. an island off the coast of SW Alaska, one of the Aleutian Islands. ab. 75 mi. (120 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Unalachtigo unalienable Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language