definition of
threatening

[1] #1 threatening s. [baleful, forbidding, menacing, minacious, minatory, ominous, sinister] threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clo. wn

[2] #2 threatening s. [heavy, lowering, sullen] darkened by clouds; "a heavy sky". wn