Definition of wear one's heart on one's sleeve
- He wears his heart on his sleeve.
: to bear or have on the person
: to use habitually for clothing, adornment, or assistance
: to carry on the person
: the act of wearing : the state of being worn : use
: clothing or an article of clothing usually of a particular kind
: fashion, vogue
: a part of a garment covering an arm
: a tubular part (such as a hollow axle or a bushing) designed to fit over another part
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