From Longman Dictionary of Contemporary EnglishI knowI knowa)AGREEused to agree with someone or to say that you feel the same way‘We have to talk about it, Rob.’ ‘Yeah, I know.’b)THINK something/HAVE A THOUGHTused to say that you have suddenly had an idea, thought of a solution to a problem etcI know! Let’s go out for a meal on your birthday.c)AGREEused to stop someone from interrupting because they have an opinion about what you are sayingIt sounds silly, I know, but I will explain.I know, I know, I should have had the car checked out before now. →know
Examples from the Corpus
I know• No one, as far as I know, has ever before cut away the wing of a submerged big jet.• My two chips were ready in my sweatypalm. I knew I had him on toast.• I know, I know, we should have called and made reservations.• No Francis, anywhere. I knew I was alone now.• All I know is that I am on my way out.• "It is really hot out there today." "I know. It's miserable."• I know! Let's turn the couch this way and then the table will fit.• I know the why of this, but I know it only now as I write these words.• And I know what you're thinking.