Meaning of OK in English
1. agreed or acceptable
That's OK.
2. not good but certainly not good
Her voice was OK, but it's nothing special.
3. well
Everything was going OK until she was affected by an unexpected illness.
1. used to show that you agree with or accept something
My Skype isn't working. Let me call you back, okay?
1. approval
1. agree to something or approve it
His doctor wouldn't OK the trip.