[1] : The Collaborative International Dictionary of English v.0.48

dig \dig\ di^g, v. t. imp.  p. p. dug du^g or
   digged di^gd; p. pr.  vb. n. digging. -- digged is
   archaic. oe. diggen, perh. the same word as diken, dichen
   see dike, ditch; cf. dan. dige to dig, dige a ditch; or
   ? akin to e. 1st dag. root67.
   1. to turn up, or delve in, earth with a spade or a hoe; to
      open, loosen, or break up the soil with a spade, or
      other sharp instrument; to pierce, open, or loosen, as if
      with a spade.
      1913 webster

            be first to dig the ground.           --dryden.
      1913 webster

   2. to get by digging; as, to dig potatoes, or gold.
      1913 webster

   3. to hollow out, as a well; to form, as a ditch, by removing
      earth; to excavate; as, to dig a ditch or a well.
      1913 webster

   4. to thrust; to poke. colloq.
      1913 webster

            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.
      1913 webster

   5. to like; enjoy; admire. the whole class digs pearl jam.
      colloq.
      pjc

   to dig down, to undermine and cause to fall by digging; as,
      to dig down a wall.

   to dig from, to dig out of, to dig out, to dig 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,
      a to cover by digging; as, to dig in manure.
      b to entrench oneself so as to give stronger resistance;
          -- used of warfare or negotiating situations.

   to dig in one's heels to offer stubborn resistance.
      1913 webster +pjc
see also:
dug digged digging dike ditch to dig down 
to dig from to dig out of to dig out to dig up to dig in 
to dig in one's heels 

[2] : The Collaborative International Dictionary of English v.0.48

dig \dig\, v. i.
   1. to work with a spade or other like implement; to do
      servile work; to delve.
      1913 webster

            dig for it more than for hid treasures. --job iii.
                                                  21.
      1913 webster

            i can not dig; to beg i am ashamed.   --luke xvi. 3.
      1913 webster

   2. mining to take ore from its bed, in distinction from
      making excavations in search of ore.
      1913 webster

   3. to work hard or drudge; specif. u. s.: to study
      ploddingly and laboriously. colloq.
      webster 1913 suppl.

            peter dug at his books all the harder. --paul l.
                                                  ford.
      webster 1913 suppl.

   4. mach. of a tool: to cut deeply into the work because ill
      set, held at a wrong angle, or the like, as when a lathe
      tool is set too low and so sprung into the work.

   to dig out, to depart; to leave, esp. hastily; decamp.
      slang, u. s.
      webster 1913 suppl.
see also:
to dig out 

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