1. Designating sound transmission or recording or reproduction over a single channel
   - mono, monophonic

See also: monaural

• unannounced
• unanswerable
• unanswered
• unanticipated
• unapologetic
• unappareled
• unapparelled
• unapparent
• unappealable
• unappealing
• unappealingly
• unappeasable
• unappendaged
• unappetising
• unappetisingness
• unappetizing
• unappetizingness
• unappreciated
• unappreciative
• unappreciatively
• unapprehensive
• unapproachability
• unapproachable
• unappropriated
• unapproved