extending far downwards, back, or inwards from a surface or area
having a specified extension in an implied direction
a shelf 20 centimetres deep
coming from very low in the chest
a deep sigh
said of a colour: high in saturation and low in lightness; dark and full
of a sound: having a low musical pitch or pitch range
intellectually demanding or difficult to understand
capable of serious and significant thought
a deep thinker
(+ in) experiencing or involved in something to a great extent or with great intensity
deep in debt
(+ in) absorbed or engrossed
deep in thought
intense or extreme
deep sleep
informal cunning or devious
remote in time or space
in sport, near or towards the outer limits of the playing area, or far from an attacking movement
in cricket, of or occupying a fielding position far from the batsman
to become very excited or angry
chiefly NAmer to enter recklessly on a course of action
in difficulty or distress; unable to manage