Definition of look through
1 : to read or briefly examine some of the pages of (a book, magazine, etc.) <She was looking through a magazine as she waited in the doctor's office.>
2 : to look at the different parts of (a collection or group of things) <I looked through all his letters.>
3 : to place one's eyes so as to see through (something) <look through a telescope>
4 : to pretend not to see or recognize (someone) in a rude or unfriendly way <We used to be best friends but when she passed me on the street yesterday she looked (right/straight) through me without even saying hello!>
Seen and Heard
What made you want to look up look through? Please tell us where you read or heard it (including the quote, if possible).