Dictionary.net

A figure of speech in which the speaker breaks off suddenly, as if unwilling or unable to state what was in his mind; as, I declare to you that his conduct - but I can not speak of that, here.

A figure of speech in which the speaker breaks off suddenly, as if unwilling or unable to state what was in his mind; as, I declare to you that his conduct - but I can not speak of that, here.

A form of speech, by which the speaker, through some affection or vehemency, breaks off his speech.