Through, adv. 1. From one end or side to the other; as, to pierce a thing through.
2. From beginning to end; as, to read a letter through.
3. To the end; to a conclusion; to the ultimate purpose; as, to carry a project through.
☞ Through was formerly used to form compound adjectives where we now use thorough; as, through-bred; through-lighted; through-placed, etc.
To drop through, to fall through; to come to naught; to fail. — To fall through. See under Fall, v. i.