Noah Webster's New International Dictionary of the English Language
1. (v. i.) To dig in or under the ground, generally for an object that is difficult to reach or extricate; to be occupied in digging.
2. (v. i.) To drudge; to do menial work.
3. (v. t.) To dig; to dig up by the roots; to root out by digging; -- followed by up; as, to grub up trees, rushes, or sedge.
4. (v. t.) To supply with food.
5. (n.) The larva of an insect, especially of a beetle; -- called also grubworm.
6. (n.) A short, thick man; a dwarf.
7. (n.) Victuals; food.