?What is the meaning of TEFL, TESL & TESOL

TEFL:  

Teaching English as a Foreign Language – a term that refers to teacher training programs in EFL.

TESL:

 Teaching English as a Second Language, - a term that refers to teacher training programs in ESL.

TESOL:

Teaching English to Speakers of Other Languages – a term that is used to distinguish English language teaching as a professional activity that requires specialized training.