set heart on

set (one's) heart on (something)

To resolutely determine to do or acquire something. When I was a little boy, I set my heart on becoming a fighter pilot. When Janie sets her heart on a new toy, she won't give us a moment's peace until we buy it for her.
See also: heart, on, set
Farlex Dictionary of Idioms.

set one's heart on someone or something

Fig. to be determined to get or do someone or something. I am sorry you didn't get to pick the one you wanted. I know you had set your heart on Fred. Jane set her heart on going to London.
See also: heart, on, set
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

set (one's) heart on

To be determined to do something.
See also: heart, on, set
American Heritage® Dictionary of the English Language, Fifth Edition.

set one's heart on, to

To have an earnest desire for; to determine to obtain something. The heart has long been equated with one’s innermost being, and to “set” it on something means to fix it in that direction. This term dates from the fourteenth century. It appears in the Bible: “If riches increase, set not your heart upon them” (Psalms 62:10). This passage is repeated in the Book of Common Prayer.
See also: heart, set
The Dictionary of Clichés by Christine Ammer
See also:
  • set (one's) heart on (something)
  • set one's heart on
  • set your heart on
  • set your heart on something
  • set your heart/mind on something/on doing something
  • (one's) heart is set against (something)
  • one's heart is set against
  • have a heart
  • with all heart
  • with all my heart