Phrasal Verb: Grow Into Posted on 12th October 201725th September 2017 by DoubleClick grow into means to grow to fit large clothes (e.g. This bike is too big for her now, but she will grow into I soon.) Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Posted in Phrasal Verb and tagged Grow Into, Phrasal verb.