Overt

Part of speech: adjective (a.)

1. Open to view; public; apparent; manifest. Overt and apparent virtues bring forth praise. Bacon.

2. Not covert; open; public; manifest; as, an overt act of treason. Macaulay. No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open court. Constitution of the U. S.