from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Suggesting or threatening evil: a sinister smile.
- adj. Presaging trouble; ominous: sinister storm clouds.
- adj. Attended by or causing disaster or inauspicious circumstances.
- adj. On the left side; left.
- adj. Heraldry Situated on or being the side of a shield on the wearer's left and the observer's right.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Inauspicious, ominous, unlucky, illegitimate (as in bar sinister).
- adj. Evil or seemingly evil; indicating lurking danger or harm.
- adj. Of the left side.
- adj. On the left side of a shield from the wearer's standpoint, and the right side to the viewer.
- adj. Wrong, as springing from indirection or obliquity; perverse; dishonest.
from the GNU version of the Collaborative International Dictionary of English
- adj. On the left hand, or the side of the left hand; left; -- opposed to
dexter, or right.
- adj. Unlucky; inauspicious; disastrous; injurious; evil; -- the left being usually regarded as the unlucky side.
- adj. Wrong, as springing from indirection or obliquity; perverse; dishonest; corrupt.
- adj. Indicative of lurking evil or harm; boding covert danger.
from The Century Dictionary and Cyclopedia
- Left, as opposed to right; on the left side; specifically, in heraldry, noting the left-hand side of the person who carries the shield on his arm (therefore the right-hand side of the spectator): the sinister part of the escutcheon is opposed to the dexter part (see dexter).
- On or toward the left or unlucky side; hence, of ill omen; inauspicious; threatening or suggesting evil.
- Bringing evil; harmful; malign; unfortunate in results.
- Unpleasant; disagreeable.
- Malicious; evil; base; wrong.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. stemming from evil characteristics or forces; wicked or dishonorable
- adj. on or starting from the wearer's left
- adj. threatening or foreshadowing evil or tragic developments
Middle English sinistre, unfavorable, from Old French, from Latin sinister, on the left, unlucky.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English sinistre ("unlucky"), from Old French sinistra ("left"), from Latin sinestra ("left hand"). (Wiktionary)