[mass noun]the action of saying farewell 告别 he spread his palm in valediction. 他伸开手掌告别。 ■[count noun]a statement or address made at or as a farewell 告别词 his official memorial valediction. 他的正式纪念告别词。
语源
mid 17th cent.: based on Latin vale 'goodbye' + dicere 'to say', on the pattern of benediction