Thumb through Definition 1 of 1Pro Tip 1/3Brief Browsing Used when someone looks over content quickly without reading in detail. In the library, he thumbed through several books to find the right one. Pro Tip 2/3Casual Glance Implies a laid-back, non-intensive way of checking something out. She thumbed through the catalog, not looking for anything in particular. Pro Tip 3/3Physical Interaction Involves the physical act of using the thumb to turn pages. He thumbed through the old photo album, feeling nostalgic.