From The Collaborative International Dictionary of English v.0.48 :
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]From WordNet (r) 3.0 (2006) :
semicolon n 1: a punctuation mark (`;') used to connect independent clauses; indicates a closer relation than does a periodFrom The Free On-line Dictionary of Computing (30 December 2018) :
semicolon ; ; Common: ITU-T: semicolon; semi. Rare: weenie; INTERCAL: hybrid, pit-thwong.