Used as a gerund-noun meaning the act or expression of glowering; usually uncountable but occasionally pluralised.
regard noirExpression figée pour un regard sombre, hostile ou boudeur. His constant glowering made everyone uneasy.
Son regard noir constant mettait tout le monde mal à l’aise.
Synonyms
ominous stare
stern look
sullen look
bad look
dirty look