Definition of "all right" in Essential American English Dictionary

all right

adjective, adverb us /ˌɔl ˈraɪt/ also alright

A1 happening successfully or without problems:

Did the interview go all right?

A2 safe or well:

You look pale – are you all right?

A2 used to ask if you can do something or to say that someone can do something:

Is it all right if I put some music on?

B1 good enough, although not excellent:

The hotel wasn’t great, but it was all right.
that’s all right

A2 something you say when someone says sorry to show that you are not angry:

“I’m sorry, I forgot all about your party.” “That’s all right.”
that’s all right

A2 used as an answer when someone thanks you:

“Thanks for cleaning the kitchen.” “That’s all right.”

(Definition of “all right adjective, adverb” from the Webster's Essential Mini Dictionary © Cambridge University Press)