What does "dig" mean?

Additional senses

1. 2.To hollow out, as a well; to form, as a ditch, by removing earth; to excavate; as, to dig a ditch or a well.
2. 3.To thrust; to poke. [Colloq.] You should have seen children . . . dig and push their mothers under the sides, saying thus to them: Look, mother, how great a lubber doth yet wear pearls. Robynson (More's Utopia). To dig down, to undermine and cause to fall by digging; as, to dig down a wall. -- To dig from, out of, out, or up, to get out or obtain by digging; as, to dig coal from or out of a mine; to dig out fossils; to dig up a tree. The preposition is often omitted; as, the men are digging coal, digging iron ore, digging potatoes. -- To dig in, to cover by digging; as, to dig in manure.(b) To entrench oneself so as to give stronger resistance; -- used of warfare. Also figuratively, esp. in the phrase to dig in one's heels.
3. 4.To work with a spade or other like implement; to do servile work; to delve. Dig for it more than for hid treasures. Job iii.
4. 5.I can not dig; to beg I am ashamed. Luke xvi.
5. 6.2. (Mining) To take ore from its bed, in distinction from making excavations in search of ore.
6. 7.To work like a digger; to study ploddingly and laboriously. [Cant, U.S.]
7. 8.A thrust; a punch; a poke; as, a dig in the side or the ribs. See Dig, v. t., 4. [Colloq.]
8. 9.A plodding and laborious student. [Cant, U.S.]