What does "creeper" mean?

Additional senses

1. 2.(Zoöl.) A small bird of the genus Certhia, allied to the wrens. The brown or common European creeper is C. familiaris, a variety of which (var. Americana) inhabits America; -- called also tree creeper and creeptree. The American black and white creeper is Mniotilta varia.
2. 3.A kind of patten mounted on short pieces of iron instead of rings; also, a fixture with iron points worn on a shoe to prevent one from slipping.
3. 4.pl. A spurlike device strapped to the boot, which enables one to climb a tree or pole; -- called often telegraph creepers.
4. 5.A small, low iron, or dog, between the andirons.
5. 6.pl. An instrument with iron hooks or claws for dragging at the bottom of a well, or any other body of water, and bringing up what may lie there.
6. 7.Any device for causing material to move steadily from one part of a machine to another, as an apron in a carding machine, or an inner spiral in a grain screen.
7. 8.pl. (Arch.) Crockets. See Crocket.