Definitions
1.adjective(of a physical distance) Extending far away from a point of reference, especially downwards.
2.adjective(intellectual, social) Complex, involved.
3.adjective(sound, voice) Low in pitch."She has a very deep contralto voice."
4.adjective(of a color) Highly saturated."That's a very deep shade of blue."
5.adjective(sleep) Sound, heavy (describing a state of sleep from which one is not easily awoken)."He was in a deep sleep."
6.adjectiveImmersed, submerged (in)."deep in debt"
7.adjectiveMuddy; boggy; sandy; said of roads.
8.adjective(of time) Distant in the past, ancient."deep time"