Trepan — Defs

01 n. A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See Trephine.

1.
A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See Trephine.(Surg.) See: Trephine
2.
A kind of broad chisel for sinking shafts.(Mining)

02 v. t. & i. To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to p…

imp. & p. p. Trepanned; p. pr. & vb. n. Trepanning

1.
To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to perform an operation with the trepan.(Surg.)

03 n. A snare; a trapan.

1.
A snare; a trapan.
“Snares and trepans that common life lays in its way.” — South.
2.
a deceiver; a cheat.
“He had been from the beginning a spy and a trepan.” — Macaulay.

04 v. t. To insnare; to trap; to trapan.

1.
To insnare; to trap; to trapan.
“Guards even of a dozen men were silently trepanned from their stations.” — De Quincey.