be/become aware
1 [transitive, intransitive] (not used in the progressive tenses) to understand or become aware of a particular fact or situationrealize (that)… I didn't realize (that) you were so unhappy.The moment I saw her, I realized something was wrong.realize how, what, etc… I don't think you realize how important this is to her.realize (something) I hope you realize the seriousness of this crime.Only later did she realize her mistake.The situation was more complicated than they had at first realized.They managed to leave without any of us realizing.it is realized that… There was a cheer when it was realized that everyone was safely back.achieve something
2 [transitive] realize something to achieve something important that you very much want to doShe never realized her ambition of becoming a professional singer.We try to help all students realize their full potential (= be as successful as they are able to be).happen
3 [transitive, usually passive] realize something if somebody's fears are realized, the things that they are afraid will happen, do happenHis worst fears were realized when he saw that the door had been forced open.sell
4 [transitive] realize your assets (formal) to sell things that you own, for example property, in order to get the money that you need for somethingSynonym
convert5 [transitive] realize something (formal) (of goods, etc.) to be sold for a particular amount of moneySynonym
makeThe paintings realized $2 million at auction.

ˈriːəlaɪz
ˈriːəlaɪz