Definition of make someone's day
- Thanks for the compliment. You've really made my day!
- It made my day to see his smiling face.
: behave, act
: to begin or seem to begin (an action)
: to cause to happen to or be experienced by someone
: the manner or style in which a thing is constructed
: the physical, mental, or moral constitution of a person
: some person : somebody
: the time of light between one night and the next
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