The definition of a late bloomer is someone or something that does not come into his or her its own, either mentally or physically, until after most other peers.
An example of a late bloomer is a person who is shorter than all her classmates but has a growth spurt right before going to college.
a person who matures, achieves proficiency in some field or skill, etc. later than such a person is normally expected to
(plural late bloomers)