Definition of have half a mind
- I have half a mind to tell her what I really think of her.
: either of two equal parts that compose something
: half an hour
: one of a pair: such as
: being one of two equal parts
: that is approximately equal to either of two equal parts that compose something : amounting to approximately half
: falling short of the full or complete thing : partial
: in an equal part or degree
: not completely : partially
: by any means : at all
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