Source : Webster's Revised Unabridged Dictionary (1913)

Cosier \Co"sier\ (k?"zh?r), n. [Cf. OF. coussier maker of
   mattresses; or couseor tailor, fr. OF. & F. coudre, p. p.
   cousu to sew, fr. L. consuere to sew together; con- + seure
   to sew. See {Sew} to stitch.]
   A tailor who botches his work. [Obs.] --Shak.

Source : WordNet®

cosier
     See {cosy}

cosy
     adj : enjoying or affording comforting warmth and shelter
           especially in a small space; "a cozy nook near the
           fire"; "snug in bed"; "a snug little apartment" [syn: {cozy},
            {snug}]
     n : a padded cloth covering to keep a teapot warm [syn: {tea
         cosy}, {cosey}, {tea cosey}, {cozy}, {tea cozy}, {cozey},
          {tea cozey}, {cozie}, {tea cozie}]
     [also: {cosiest}, {cosier}]