Definition of "halfwidth"

halfwidth

adjective
not comparable
1. (computing, typography) Of a text character, occupying the space of half of a fullwidth character, or one "normal" text column.
  Quotations
  This would convert any half-width katakana characters to full-width katakana.
  1993, GO Corporation, Penpoint Application Writing Guide
  ...and half-width (zenkaku, hankaku) alphabets are regarded as separate...
  1998, Rick Jelliffe, The XML & SGML Cookbook
  The half-width characters have normal character spacing...
  2002, Cay S Horstmann, Gary Cornell, Core Java 2
noun
plural halfwidths
1. (chemistry) The width of a spectroscopic peak at half its height.