Definition of borers:
(n) :
A tool used for drilling.
(n) :
A person who bores or drills; a person employed to drill bore holes.
(n) :
A tedious person, who bores others; a bore.
(n) :
An insect or insect larva that bores into wood.
(n) :
One of the many types of mollusc that bore into soft rock.
(n) :
A cyclostome, such as a hagfish, which bores into injured, dead, or decaying sea creatures to feed on their flesh.