to be aloof from the realities of living. (Live can be replaced by a number of expressions meaning "to dwell or spend time," as in the first example.) • If you didn't spend so much time in your ivory tower, you'd know what people really think! • Many professors are said to live in ivory towers. They don't know what the real world is like.
live in an ivory tower|ivory|ivory tower|live|towe
v. phr. To be blind to real life; live an unrealistically sheltered existence. Professor Nebelmacher has no idea of the cost of living; he lives in an ivory tower.