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.

(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).

(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.

(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

(chiefly in the plural) A business transaction. / One's manner of acting toward others; behaviour; interactions or relations with others.

present participle of deal

(transitive) To handle verbally or in some form of artistic expression; to address or discuss as a subject. / (transitive) To take action with respect to (someone or something).

(idiomatic) To refuse completely to do something, generally out of scorn.