- (n.) A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See Trephine.
- (n.) A snare; a trapan.
- (v.t.) To insnare; to trap; to trapan.
- (n.) a deceiver; a cheat.
- (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 perform an operation with the trepan.
- (n.) A kind of broad chisel for sinking shafts.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). trepan. Retrieved September 21, 2026, from http://smartdefine.org/trepan/definitions/2074404 |
| Chicago | Webster's. 2011. "trepan" http://smartdefine.org/trepan/definitions/2074404 (accessed September 21, 2026). |
| Harvard | Webster's 2011, trepan, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/trepan/definitions/2074404>. |
| MLA | Webster's. "trepan" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/trepan/definitions/2074404> |