I. trə̇ˈpan, trēˈ-, -ˈpaa(ə)n noun
( -s )
Etymology: Middle English trepane, from Medieval Latin trepanum, from Greek trypanon auger, trepan — more at trypan-
1. : trephine
2.
a. : a heavy tool consisting of vertical chisels fixed to a horizontal bar and used in boring mine shafts
b. : a machine tool for trepanning metals
II. transitive verb
( trepanned ; trepanned ; trepanning ; trepans )
Etymology: Middle English trepanen, from trepane trepan
1. : to use a trephine on (the skull)
2.
a. : to bore (as a mine shaft) with a trepan
b.
(1) : to remove a disk or cylindrical core from (a metal plate, ingot, or forging) with a trepan
(2) : to turn annular grooves or recesses in (as a metal block held in a lathe)
III. noun
( -s )
Etymology: origin unknown
1. archaic : decoy , trickster
2. archaic : a deceptive device or maneuver : snare
IV. transitive verb
( trepanned ; trepanned ; trepanning ; trepans )
1. archaic : entrap , lure
2. archaic : swindle