It’s about time. We are now on Instagram!
"style of speech," early 15c., from Latin locutionem (nominative locutio) "a speaking, speech, discourse; way of speaking," noun of action from past participle stem of loqui "to speak," from PIE root *tolk(w)- (cf. Old Irish ad-tluch- "to thank," to-tluch- "to ask;" Old Church Slavonic tloko "interpretation, explanation"). Related: Locutionary.