13 of an obscure nature; "the new insurance
policy is written without cryptic or mysterious terms"; "a deep
dark secret"; "the inscrutible workings of Providence"; "in its
mysterious past it encompasses all the dim origins of life"- Rachel
Carson; "rituals totally mystifying to visitors from other lands"
[syn: cryptic, cryptical, inscrutable, mysterious, mystifying]

14 difficult to penetrate; incomprehensible to
one of ordinary understanding or knowledge; "the professor's
lectures were so abstruse that students tended to avoid them"; "a
deep metaphysical theory"; "some recondite problem in
historiography" [syn: abstruse, recondite]

15 exhibiting great cunning usually with secrecy;
"deep political machinations"; "a deep plot"

Noun

1 the central and most intense or profound part;
"in the deep of night"; "in the deep of winter"

In the context of "cricket|baseball": : of a fielding
position near the boundary, or closer to the
boundary than one being compared to. 

He is fielding at deep mid wicket. 

a long way inside

deep into the forest

In the context of "sports|soccer|tennis": a long way forward

a deep volley

in a number of rows or layers

A crowd three deep along the funeral procession

In the context of "sleep": difficult to awake

in a deep sleep

right into one's mind

He looked deep into her eyes

with a lot of

deep in debt

In the context of "American football": Relatively farther
downfield. 

In the context of "horse racing": three deep. 

Cigar Pal broke a bit slow, trailed by more than seven lengths
after a half-mile, swung three deep into the stretch, rallied from
eighth to make up more than four lengths and was nosed out six
furlongs on the turf. ( Greg Melikov on http://www.sportsbook.com)