'Semicolon' definitions:

Definition of 'semicolon'

From: WordNet
noun
A punctuation mark (`;') used to connect independent clauses; indicates a closer relation than does a period

Definition of 'Semicolon'

From: GCIDE
  • Semicolon \Sem"i*co`lon\, n. The punctuation mark [;] indicating a separation between parts or members of a sentence more distinct than that marked by a comma. [1913 Webster]