Thumb through is an idiom meaning to quickly look through something, such as a book or magazine. The crossword solutions for this term are BROWSE (6 letters), RIFFLE (6 letters), SKIM (4 letters), LEAF (4 letters), and SCAN (4 letters). To BROWSE means to look through something in a leisurely manner, while RIFFLE means to quickly flip through the pages of a book or magazine. SKIM, LEAF, and SCAN all mean to quickly look through something, but with slightly different nuances. SKIM implies looking at the surface of something, LEAF implies flipping through the pages of a book or magazine, and SCAN implies looking at something quickly and superficially.