TEFL is the acronym for Teaching English as a foreign language or, simply, English language instruction for non-native speakers. It refers to speakers of other languages learning to speak and understand English.
A Teaching English as a Foreign Language (TEFL) certification is an internationally recognised qualification to teach English abroad. A TEFL qualification allows teachers to teach English to learners whose first language is not English.
Read more: The Basics of Teaching English as a Foreign Language