the act or an instance of choosing; option.

absence of certainty; uncertainty.

indecision; irresolution; doubt; hesitation.

a secret, usu. evil, project or scheme; conspiracy; a plot.

the period of transition from one era or epoch to antoehr.

sort; variety; class; kind.

an error or fault; a blunder.

the condition, quality, fact or instance of being different; difference.

something that is imagined; an imagined thing; imagination; a false notion.

(gram.) the occurrence of a variant of a morpheme or phoneme; alternation; admission of an option or alternative (at one's option).

(rhet.) a figure of speech, in which there is an option to select between two similar but opposite choices.

(math.) any of the total number of groupings that can be arranged with or without regard to any order; permutations and combinations.