1. Moderately formal; requiring a dinner jacket
   "he wore semiformal attire"
   - semi-formal, black-tie

See also: formal

• tonal system
• tonality
• tonally
• tondo
• tone
• tone arm
• tone deafness
• tone down
• tone ending
• tone language
• tone of voice
• tone poem
• tone system
• tone up
• tone-beginning
• tone-deaf
• toned
• Tonegawa Susumu
• toneless
• tonelessly
• toneme
• Hastinapura
• hastiness
• Hastings
• hasty