~ 1
informal
■ noun a person who is in charge of an employee or organization.
■ verb (usu. ~ someone about/around ) give orders in a domineering manner.
■ adjective N. Amer. excellent.
Origin
C19 (orig. US): from Du. baas 'master'.
————————
~ 2
■ noun
1》 a stud on the centre of a shield.
2》 Architecture an ornamental carving at the point where the ribs in a ceiling cross.
3》 the central part of a propeller.
4》 Geology a large mass of igneous rock protruding through other strata.
Origin
ME: from OFr. boce .