\Sin"is*ter\ (s[i^]n"[i^]s*t[~e]r; 277), a.
Note: [Accented on the middle syllable by the older poets, as
      Shakespeare, Milton, Dryden.] [L. sinister: cf. F.
      sinistre.]
1. On the left hand, or the side of the left hand; left; --
   opposed to {dexter}, or {right}. ``Here on his sinister
   cheek.'' --Shak.
         My mother's blood Runs on the dexter cheek, and this
         sinister Bounds in my father's        --Shak.
Note: In heraldy the sinister side of an escutcheon is the
      side which would be on the left of the bearer of the
      shield, and opposite the right hand of the beholder.
2. Unlucky; inauspicious; disastrous; injurious; evil; -- the
   left being usually regarded as the unlucky side; as,
   sinister influences.
         All the several ills that visit earth, Brought forth
         by night, with a sinister birth.      --B. Jonson.
3. Wrong, as springing from indirection or obliquity;
   perverse; dishonest; corrupt; as, sinister aims.
         Nimble and sinister tricks and shifts. --Bacon.
         He scorns to undermine another's interest by any
         sinister or inferior arts.            --South.
         He read in their looks . . . sinister intentions
         directed particularly toward himself. --Sir W.
                                               Scott.
4. Indicative of lurking evil or harm; boding covert danger;
   as, a sinister countenance.
{Bar sinister}. (Her.) See under {Bar}, n.
{Sinister aspect} (Astrol.), an appearance of two planets
   happening according to the succession of the signs, as
   Saturn in Aries, and Mars in the same degree of Gemini.
{Sinister base}, {Sinister chief}. See under {Escutcheon}.