An archaic or alternate spelling of 'dismiss,' meaning to send away or allow to leave.
From Latin dimittere 'to send away' (di- 'away' + mittere 'to send'). This older spelling reflects the Latin root more directly than the modern 'dismiss.'
This archaic spelling shows how English spelling evolved—early printers and writers used 'dimiss' because it looked closer to the Latin source, but eventually 'dismiss' won out as the standardized form.
Complete word intelligence in one call. Free tier — 50 lookups/day.