Main entry: open, overt
Definition: open and observable; not secret or hidden
Usage: an overt lie; overt hostility; overt intelligence gathering; open ballots
Antonyms: covert
Definition: secret or hidden; not openly practiced or engaged in or shown or avowed
Antonyms: cooked
Definition: having been prepared for eating by the application of heat
Antonyms: unseeable, invisible
Definition: impossible or nearly impossible to see; imperceptible by the eye