\Through\, prep. [OE. thurgh, [thorn]urh, [thorn]uruh,
[thorn]oruh, AS. [thorn]urh; akin to OS. thurh, thuru,
OFries. thruch, D. door, OHG. durh, duruh, G. durch, Goth.
[thorn]a['i]rh; cf. Ir. tri, tre, W. trwy. [root]53. Cf.
{Nostril}, {Thorough}, {Thrill}.]
1. From end to end of, or from side to side of; from one
   surface or limit of, to the opposite; into and out of at
   the opposite, or at another, point; as, to bore through a
   piece of timber, or through a board; a ball passes through
   the side of a ship.
2. Between the sides or walls of; within; as, to pass through
   a door; to go through an avenue.
         Through the gate of ivory he dismissed His valiant
         offspring.                            --Dryden.
3. By means of; by the agency of.
         Through these hands this science has passed with
         great applause.                       --Sir W.
                                               Temple.
         Material things are presented only through their
         senses.                               --Cheyne.
4. Over the whole surface or extent of; as, to ride through
   the country; to look through an account.
5. Among or in the midst of; -- used to denote passage; as, a
   fish swims through the water; the light glimmers through a
   thicket.
6. From the beginning to the end of; to the end or conclusion
   of; as, through life; through the year.

\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.
Note: 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.

\Through\, a.
Going or extending through; going, extending, or serving from
the beginning to the end; thorough; complete; as, a through
line; a through ticket; a through train. Also, admitting of
passage through; as, a through bridge.
{Through bolt}, a bolt which passes through all the thickness
   or layers of that which it fastens, or in which it is
   fixed.
{Through bridge}, a bridge in which the floor is supported by
   the lower chords of the tissues instead of the upper, so
   that travel is between the trusses and not over them. Cf.
   {Deck bridge}, under {Deck}.
{Through cold}, a deep-seated cold. [Obs.] --Holland.
{Through stone}, a flat gravestone. [Scot.] [Written also
   {through stane}.] --Sir W. Scott.
{Through ticket}, a ticket for the whole journey.
{Through train}, a train which goes the whole length of a
   railway, or of a long route.