Meaning

verb fold over and sew together to provide with a hem

verb utter `hem' or `ahem'

origin* As an English, Scottish, and Swedish surname, from the Old Norse personal name Hemingr, variant of Hæmingr, itself of uncertain origin, possibly from hamr, hemingr (“form, shape; skin of an animal”). This word may have been borrowed into Old English as hemming (“a rawhide boot”). * As a German surname, variant of Hemme.

Etymology from Wiktionary, CC BY-SA 3.0