definition of
[sinister]

[1] #1 sinister s. [baleful, forbidding, menacing, minacious, minatory, ominous, threatening] 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 sinister s. [black, dark] stemming from evil characteristics or forces; wicked or dishonorable; "black deeds"; "a black lie"; "his black heart has concocted yet another black deed"; "Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility"; "the sc. wn

[3] #3 sinister s. on or starting from the wearer's left; "bar sinister". wn