simple past tense and past participle of realise
"After months of planning, she finally realised her dream of opening a bakery."
In plain English: To realize something means to actually make it happen after you planned for it.
"I realised I had left my keys at home when I reached for them in my pocket."
successfully completed or brought to an end
"his mission accomplished he took a vacation"
"the completed project"
"the joy of a realized ambition overcame him"