Yes. The terms "instant runoff voting," "single transferable vote," "preference voting," "the alternative vote," all refer to ranked choice voting.
Usually, the term "instant runoff voting" or "IRV" only refers to electing a single-winner office like mayor or governor, because when used to elect one candidate, RCV allows a jurisdiction to have the benefits of multiple runoff elections, but voters only need to vote a single time.
Also, the term "single transferable vote" or "STV" usually refers to electing a multi-winner office, like a city council or legislature. It is a "single" vote, because every voter has one vote, as compared to block voting, in which voters may vote for more than one candidate if more than one will be elected; and it is a "transferable" vote, because it uses round-by-round tabulation in which votes may "transfer" from candidates who are elected or who are defeated in the prior round.