What is the meaning of 空手?

to be empty-handed

to be unarmed

to be without a copy, model, diagram, blueprint, etc.

Short for 空手道 (kōngshǒudào, “karate”).

karate

the state of being empty-handed

the left, the left hand, the left-hand side

someone with nothing to do, someone unoccupied at the moment, an idler

sudden-onset pain in one's hands or arms with no clear immediate cause, such as due to arthritis or neuralgia

the state of being empty-handed, bare-handed, unarmed

the state of being empty-handed, doing nothing with no success or positive result

the state of being empty-handed, bare-handed, unarmed

chữ Hán form of không thủ (karate).

Source: wiktionary.org