unsend in English dictionary unsend Meanings and definitions of "unsend" noun (messaging, email, text messaging) The functionality or ability to reverse a message transmission verb (transitive, messaging, email, text messaging) To undo, cancel, or reverse the transmission of a message more Grammar and declension of unsend unsend (uncountable) unsend (third-person singular simple present unsends, present participle unsending, simple past and past participle unsent) more Sample sentences with "unsend" Declension Stem Try again Authors