Dictionary

light–headed

adjective light–head·ed \-ˌhe-dəd\

: unable to think and move in a normal way because of a weak and dizzy feeling

Full Definition of LIGHT-HEADED

1
:  mentally disoriented :  dizzy
2
:  lacking in maturity or seriousness :  frivolous
light–head·ed·ly adverb
light–head·ed·ness noun

First Known Use of LIGHT-HEADED

1537

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