wash up phr v [I] 1 [I,T wash sth ↔ up] BrE to wash the plates, dishes etc after a meal 【英】 〔饭后〕洗碗碟 2 [I] AmE to wash your hands 【美】 洗手: Go wash up for supper. 去洗手来吃晚饭。 3 [I,T] if something washes up or is washed up, it is moved onto the SHORE by the sea or a river 〔浪涛〕把〔某物〕冲上岸边