come to one’s senses—
1. regain consciousness; stop feeling faint:
- It wasn’t until long afterwards that she began to come to her senses.
2. start behaving sensibly:
- When will she come to her senses and see that he is a totally unsuitable man to marry?
regain one’s senses— = come to one’s senses 1:
- She felt faint in the hot room, but going out into the fresh air she quickly regained her senses.