'Nonmetal' definitions:

Definition of 'nonmetal'

From: WordNet
adjective
Not containing or resembling or characteristic of a metal; "nonmetallic elements" [syn: nonmetallic, nonmetal] [ant: metal(a), metallic]
noun
A chemical element lacking typical metallic properties

Definition of 'Nonmetal'

From: GCIDE
  • Nonmetal \Non"met`al\, n. (Chem.) Any one of the set of elements which, as contrasted with the metals, possess, produce, or receive, acid rather than basic properties; a metalloid; as, oxygen, sulphur, and chlorine are nonmetals. [1913 Webster]