I. transitive verb
1. : to cover part of (a printing surface) with something that does not print or that prevents printing: as
a. : to cover (areas on a negative being prepared for photoengraving) with an opaque substance to prevent light action ; also : to cover (areas on a plate) with a resist to prevent etching
b. : to cover a portion of (a case) with wax so as to prevent electrodeposition in an area that is to be blank in the finished electrotype
2. : to cover (teeth) with black wax to make invisible
II. transitive verb
: to sell securities of (a shareowner) on a stop order
intransitive verb
: to withdraw temporarily from enrollment at a college or university