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defenestration the act of throwing someone or something out of a window.
defense the act of defending. [5 definitions]
defenseless combined form of defense.
defenseman in the sports of hockey or lacrosse, a player or a team member who is assigned a position close to the goal in order to prevent the other team from scoring.
defense mechanism in psychology, an unconscious process that submerges or opposes ideas or actions that would be painful or inappropriate. [2 definitions]
defensible capable of being defended or justified.
defensive intended for defense or protection, or serving to defend or protect. [6 definitions]
defensive back a player in American football, whose primary role is to deflect or intercept passes. [2 definitions]
defer1 to put off until a later time or date; postpone. [3 definitions]
defer2 to submit or yield to the desire, opinion, or judgment of another.
deference respect for and submission to the desires, opinions, or judgments of another. [2 definitions]
deferential characterized by or showing deference; respectfully submissive.
deferment the act of putting off or delaying; postponement. [2 definitions]
defiance resistance against authority; insubordination; rebellion. [3 definitions]
defiant characterized by a bold disregard or contempt for authority or opposition; refusing to obey.
defibrillate to stop the fibrillation of (a heart), usu. by administering electric shock.
deficiency the quality or condition of lacking something required; insufficiency or incompleteness. [2 definitions]
deficiency disease a disease caused by lack of a specific nutrient in the diet, or by the body's inability to absorb or metabolize it.
deficiency judgment a judicial decision in favor of a creditor for that part of a debt not satisfied by the debtor, esp. following the foreclosure and sale of a mortgage property.
deficient lacking some essential part, element, substance, or characteristic. [2 definitions]
deficit an amount by which something is less than what is required or expected, esp. the amount by which income is less than expenses.