O.K.

a. 好、可以、行、對、好嗎、很好

adv. 好、可以、行、對、好嗎、很好

n. 同意、籤認、批准、認可

vt. 同意、籤認、批准、認可

英文釋義

an endorsement
give sanction to
being satisfactory or in satisfactory condition
in a satisfactory or adequate manner