define collet
from The Century Dictionary and Cyclopedia. 1  To set in or as in a collet. 2  n. A band or collar; specifically, a small collar or band worn by the inferior clergy of the Roman Catholic Church. 3  n. Among jewelers: Same as culet. 4  n. The ring or flange within which a jewel or a group of jewels is set, as that part of a ring which holds the seal. 5  n.