A deep in Tonga Trench, Pacific Ocean; the second deepest place on Earth, and deepest part of the Tonga Trench.

A deep in Mariana Trench, Pacific Ocean; the third deepest known place on Earth, second deepest in the Mariana Trench.

Synonym of chest freezer

Alternative form of deep dive.

plural of deep stall

(aviation) An extremely dangerous type of aerodynamic stall (sudden loss of lift caused by airflow separation) where the angle of attack of a T-tailled aircraft becomes so high that the horizontal stabilizer and elevators are blanketed by the turbulent wake of the main wings, rendering the stabilizer and elevators ineffective and often preventing recovery from the stall.

The distant past of the human species, going further back than prehistory and considering the evolution of modern human anatomy.

plural of deep-dive

plural of deep dive

Used other than figuratively or idiomatically: see deep, dive. / (idiomatic, often with into or on) An in-depth examination or analysis of a topic.