TLA /ˌtiː el ˈeɪ/ BrE AmE noun [countable]
(three-letter acronym) the first letters of the words in a three-word phrase, for example BTW (‘by the way’) or IMO (‘in my opinion’), used as a short form, especially on the Internet and in emails
TLA /ˌtiː el ˈeɪ/ BrE AmE noun [countable]
(three-letter acronym) the first letters of the words in a three-word phrase, for example BTW (‘by the way’) or IMO (‘in my opinion’), used as a short form, especially on the Internet and in emails
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012