Definition of have a bee in one's bonnet
- He always has a bee in his bonnet about safety.
: any of numerous hymenopterous insects (superfamily Apoidea) that differ from the related wasps especially in the heavier hairier body and in having sucking as well as chewing mouthparts, that feed on pollen and nectar, and that store both and often also honey — see africanized bee, bumblebee, carpenter bee, honeybee, sweat bee
: an eccentric notion : fancy
: the letter b
: a gathering of people for a specific purpose
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