A sensation of detachment from one's body, the presence of a tunnel of light, the apparent viewing of one's own body from on high, and similar manifestations, experienced by people whose heart and brain have temporarily ceased to function.

Open to debate; not fully proved or confirmed. / Able to be debated; up for discussion.

A topic that is open to debate.

(computing, informal) An error screen displayed by some operating systems, especially Microsoft Windows, after encountering an unrecoverable error which causes the system to shut down.

(Catholicism) The cardinal sins enumerated by Thomas Aquinas in the 13th century: pride (or vanity), envy, gluttony, greed (or avarice), lust, sloth, and wrath (or anger).

The act of debasing or the state of being debased; a lowering or degradation, especially in character or quality.

(dated) Used as the salutation at the beginning of a formal letter when addressing persons – assumed to be male – of unknown names.

(physiology) The portion of the respiratory tract that is ventilated but not perfused by pulmonary circulation.

(biology) Initialism of dynamic energy budget.

(ergative) to make something inactive or no longer effective / to prevent the action of a biochemical agent (such as an enzyme) / to remove a person or piece of hardware from active military service