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

See also: formal

• resemble
• resend
• resent
• resentful
• resentfully
• resentfulness
• resentment
• reserpine
• surface fire
• surface gage
• surface gauge
• surface lift
• surface mail
• surface noise
• surface search radar
• surface ship
• surface soil
• surface tension
• surface-active
• surface-active agent
• surface-assimilative
• surface-mine
• surface-to-air
• surface-to-air missile
• surface-to-air missile system