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Comprehensive
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extent the degree, amount, space, or distance that something reaches or covers. [3 definitions]
extenuate to reduce the magnitude or seriousness of (a fault or offense) by offering partial excuses.
exterior on or related to the outside or outer side. [5 definitions]
exterior angle any of the four angles formed outside of two parallel lines where they are intersected by a transverse line. (Cf. interior angle.) [2 definitions]
exteriorize to make external or exterior.
exterminate to get rid of by totally destroying; eradicate; wipe out.
exterminator someone or something that exterminates. [2 definitions]
external of the outside or outer part; being outside. [6 definitions]
external-combustion engine an engine in which the combustion of fuel occurs outside the cylinder or turbine, as in a steam engine.
external degree a college or university diploma awarded to a nonmatriculated student who has earned credit through work experience, nonacademic training, independent study, or the passing of proficiency examinations.
externalize to manifest or make external. [2 definitions]
external respiration the exchange of carbon dioxide and oxygen across external or respiratory surfaces, such as gills, in multicellular organisms.
extinct no longer existing, as an animal species. [3 definitions]
extinction the act or process of becoming or making extinct, or of being ended or putting an end to. [2 definitions]
extinguish to put out (a fire, flame, or light). [4 definitions]
extinguishable combined form of extinguish.
extinguisher one that extinguishes, esp. a fire extinguisher.
extirpate to get rid of completely, as if by pulling up the roots; root out. [3 definitions]
extol to speak of with high praise or enthusiasm.
extort to extract or obtain (money or the like) by force, threats, or abuse of authority.
extortion the act or an instance of coercing someone by force, threats, or abuse of authority to give something valuable, such as money, information, excessive interest, or the like. [2 definitions]