To use threats or menaces; have a menacing aspect.To give indication of menace, or of impending danger or mischief; become overcast, as the sky.To declare an intention of doing mischief to or of bringing evil on: use threats toward; menace; terrify, or attempt to terrify, by menaces: with with before the evil threatened.To charge or enjoin solemnly or with menace.To be a menace or source of danger to.To give ominous indication of; presage; portend: as, the clouds threaten rain or a storm.To announce or hold out as a penalty or punishment: often followed by an infinitive clause.Synonyms Menace, Threaten (see menace), forebode, foreshadow.