Meaning & Definition of Sinister in English

1. 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 clouds"

• "The situation became ugly"

2. 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 scheme of some sinister intelligence bent on punishing him"-thomas hardy

3. On or starting from the wearer's left

• "Bar sinister"