'in-between' definitions:

Definition of 'in-between'

From: WordNet
adjective
Being neither at the beginning nor at the end in a series; "adolescence is an awkward in-between age"; "in a mediate position"; "the middle point on a line" [syn: in-between, mediate, middle]

Definition of 'in-between'

From: GCIDE
  • in-between \in-between\ adj. being neither at the beginning nor at the end in a series or time sequence; as, adolescence is an awkward in-between age.
  • Syn: mediate, middle. [WordNet 1.5]