A measure of the quality of an electric circuit; the ratio of the reactance to the resistance.

(science fiction) A hypothetical figure describing a speed of one light-year per hour.

(idiomatic) The emotional dimension of decision-making. A person's subjective (often almost visceral) feelings about what is right or wrong, good or bad.

(category theory) Said of a morphism: to be equal to a composition of two morphisms, one of which is the given morphism (that is being said to be "factored through").

(US, slang) An intangible quality, usually attributed to certain items of professional equipment but sometimes to particular positions within predominantly and traditionally male professions such as law enforcement and the military where the term is most frequently used, that is believed to stir inordinate interest in obtaining the item or position because it makes the possessor feel confident, cool and thus desirable to women.

(colloquial, humorous) The degree to which somebody cares about something.

(slang) The element of a situation or problem that should be obvious but may go unnoticed through human error.

(informal) The feature of a situation, product etc. that generates amazement and excitement.

(uncountable, statistics) A statistical method used to describe variability among observed correlated variables in terms of one or more unobserved variables (called factors).

plural of factor analysis