Meaning of “realize” - Learner’s Dictionary

realize

verb [ T ] also UK -ise us uk /ˈrɪəlaɪz/
Extra Examples
You don't seem to realize the gravity of the situation.Do you realize how much work you're letting yourself in for?They are just beginning to realize the full extent of the damage.I suddenly realized who she was.When I played back our conversation, I realized I hadn't made myself clear.
NOTICE

B1 to notice or understand something that you did not notice or understand before:

[ + question word ] I didn't realize how unhappy she was.
I suddenly realized I'd met him before.
[ + (that) ] Some people just don't seem to realize that the world has changed.
realize an ambition/dream/goal, etc

to achieve something that you have wanted for a long time:

He had realized all his ambitions by the age of 30.
SELL

to sell things that you own:

to realize your assets
MAKE MONEY

to be sold for a particular amount of money:

The shares realized £1.4 million.

(Definition of “realize” from the Cambridge Learner’s Dictionary © Cambridge University Press)