A ridge that forms the borders of the upper and lower jaws and contains the sockets of the teeth.
1What happens with an s sound is it's further away from that gum ridge so we get sh, sh.
2Claire Danes normally makes this sounds with her tongue tip towards her alveolar ridge that gum ridge behind the teeth.
3We were on Blue Gum Ridge hunting squirrels, and we got to talking over one thing and another.
4"Press a flat side against the skin just above the gum ridge," the professor said.