swept

adj

1. (not-comparable)Cleared of mines (explosive devices).

   “Having survived the seemingly-random attacks through the day, and now under the cover of night, the Germans seem to have a clear run to safety. However, back when the route became clear thanks to the Enigma intercepts, Bomber Command had laid more mines in the swept channel. And now, along comes Gneisenau!”

verb

1. (form-of, participle, past)simple past and past participle of sweep