Source : Webster's Revised Unabridged Dictionary (1913)

Unseconded \Un*sec"ond*ed\, a.
   1. Not seconded; not supported, aided, or assisted; as, the
      motion was unseconded; the attempt was unseconded.

   2. Not exemplified a second time. [Obs.] ``Strange and
      unseconded shapes of worms.'' --Sir T. Browne.