/ Dictionary / Index E ESL: Meaning and Definition of Find definitions for: ESL Pronunciation: [key] English as a second language: the study of English by nonnative speakers in an English-speaking environment. Cf. EFL. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Eskişehir eslisor 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