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1 : to cover a surface with material to make a floor — usually used as (be) floored

• The lobby is floored with marble.

2 a : to knock someone to the floor or ground

• He floored me with his first punch.

b informal : to surprise, shock, or amaze someone very much

• The news just floored

— often used as (be) floored

• I was floored by the news.
• She was floored by his knowledge of the subject.

3  informal : to press (the accelerator of a vehicle) to the floor — usually used in the phrase floor it

• When the light turned green, he floored it.