■ adjective
1》 suggestive of evil or harm.
2》 archaic & Heraldry on or towards the left-hand side (in a coat of arms, from the bearer's point of view, i.e. the right as it is depicted). The opposite of dexter 1 .
Derivatives
~ly adverb
~ness noun
Origin
ME: from OFr. sinistre or L. ~ 'left'.