adjective
- suggesting evil, harm, or trouble; threatening or ominous
- on or relating to the left side
Usage: heraldry; formal
Examples
- The abandoned house had a sinister appearance in the moonlight.
- There was something sinister about his smile that made her uncomfortable.
- The dark clouds gathered in a sinister formation above the town.
- She detected a sinister plot behind the seemingly innocent invitation.
- The villain’s sinister laugh echoed through the empty hallway.
- In heraldry, the sinister side refers to the left side of the shield.