1.verbTo create a large hole by making a narrow groove outlining the shape of the hole and then removing the plug of material remaining by less expensive means.
2.verbTo use a trepan; to trephine.
3.verbTo ensnare; to seduce, to trick.
"1798 Charlotte Turner Smith: The Young Philosopher. Vol.4, Chapter 9. ...a postchaise, into which he had so infamously trepanned me..."