Verb
(now uncommon outside certain constructions) Infinitive or present tense form of used to: formerly (and habitually or repeatedly) be accustomed to.
Did I use to wear that?
(nonstandard, proscribed) Synonym of used to
I use to go every year, until I moved out of the area.
Used other than figuratively or idiomatically: see use, to.
Source: en.wiktionary.org