Out of one's gourd is a colloquial phrase that means crazy or insane. Some antonyms for out of one's gourd could be calm, clear-headed, sane, reasonable, rational or level-headed. These words imply an opposite state of mind that is not wild or erratic, but rather logical and composed. Being cool, collected, or balanced would also convey a state of mental stability, whereas being impulsive or out of control would be the direct opposite. To sum it up, the antonyms of out of one's gourd signify an individual who is not lacking in mental faculties or sanity, but instead has a sound and rational state of mind.
