(1)泳ぐ他動詞
(2)水を通して移動する
(3)まるで水中をすべるように、動く
(4)travel through water; "We had to swim for 20 minutes to reach the shore"; "a big fish was swimming in the tank"
さらに詳しく
(1)動詞「泳ぐ」の命令形。