- the clause expressing the condition in a conditional sentence, in English usually beginning with if.
- the first part of an ancient drama, in which the characters are introduced and the subject is proposed.
- (in Aristotelian logic) a proposition, especially one used as a premise in a syllogism.
- the antecedent of a conditional statement, such as it rains in if it rains the game will be cancelled
- (in classical drama) the introductory part of a play
