Passing by a scenic lake on a road trip, a friend might point out that they have swam in its crystal-blue water. Another might say that they, too, have swum in it. The grammarian road tripper in the car catches the incorrect usage of swam and chimes in: "Swum is the correct inflection of swim when using it in the present perfect or past perfect tenses. . Basically, swam is …

SWUM definition: 1. past participle of swim 2. past participle of swim 3. past participle of swim. Learn more.