Antonyms of adj in_their_right_minds

1 sense of in their right minds

Sense 1
in his right mind (predicate), in her right mind (predicate), in their right minds (predicate) -- (behaving responsibly)

INDIRECT (VIA sane) -> insane -- (afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter")

Similarity of adj in_their_right_minds

1 sense of in their right minds

Sense 1
in his right mind (predicate), in her right mind (predicate), in their right minds (predicate) -- (behaving responsibly)
       => sane (vs. insane) -- (mentally healthy; free from mental disorder; "appears to be completely sane")