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

tower \tow"er\, n. oe. tour,tor,tur, f. tour, l. turris; akin
   to gr. ?; cf. w. twr a tower, ir. tor a castle, gael. torr a
   tower, castle. cf. tor, turret.
   1. arch.
      a a mass of building standing alone and insulated,
          usually higher than its diameter, but when of great
          size not always of that proportion.
      b a projection from a line of wall, as a fortification,
          for purposes of defense, as a flanker, either or the
          same height as the curtain wall or higher.
      c a structure appended to a larger edifice for a special
          purpose, as for a belfry, and then usually high in
          proportion to its width and to the height of the rest
          of the edifice; as, a church tower.
          1913 webster

   2. a citadel; a fortress; hence, a defense.
      1913 webster

            thou hast been a shelter for me, and a strong tower
            from the enemy.                       --ps. lxi. 3.
      1913 webster

   3. a headdress of a high or towerlike form, fashionable about
      the end of the seventeenth century and until 1715; also,
      any high headdress.
      1913 webster

            lay trains of amorous intrigues
            in towers, and curls, and periwigs.   --hudibras.
      1913 webster

   4. high flight; elevation. obs. --johnson.
      1913 webster

   gay lussac's tower chem., a large tower or chamber used
      in the sulphuric acid process, to absorb by means of
      concentrated acid the spent nitrous fumes that they may
      be returned to the glover's tower to be reemployed. see
      sulphuric acid, under sulphuric, and glover's tower,
      below.

   glover's tower chem., a large tower or chamber used in
      the manufacture of sulphuric acid, to condense the crude
      acid and to deliver concentrated acid charged with nitrous
      fumes. these fumes, as a catalytic, effect the conversion
      of sulphurous to sulphuric acid. see sulphuric acid,
      under sulphuric, and gay lussac's tower, above.

   round tower. see under round, a.

   shot tower. see under shot.

   tower bastion fort., a bastion of masonry, often with
      chambers beneath, built at an angle of the interior
      polygon of some works.

   tower mustard bot., the cruciferous plant arabis
      perfoliata.

   tower of london, a collection of buildings in the eastern
      part of london, formerly containing a state prison, and
      now used as an arsenal and repository of various objects
      of public interest.
      1913 webster
see also:
tor turret gay lussac's tower sulphuric acid sulphuric glover's tower 
round tower round shot tower shot tower bastion 
tower mustard arabis perfoliata tower of london 

Tower >> T Words
Tower, definition of term: Tower
tower_pag1.html

Bastion >> B Words
Bastion, definition of term: Bastion
bastion_pag1.html

Martello Tower >> M Words
Martello Tower, definition of term: Martello Tower
martello+tower_pag1.html

Water Tower >> W Words
Water Tower, definition of term: Water Tower
water+tower_pag1.html

Ivory Tower >> I Words
Ivory Tower, definition of term: Ivory Tower
ivory+tower_pag1.html

Control Tower >> C Words
Control Tower, definition of term: Control Tower
control+tower_pag1.html

Conning Tower >> C Words
Conning Tower, definition of term: Conning Tower
conning+tower_pag1.html

Bell Tower >> B Words
Bell Tower, definition of term: Bell Tower
bell+tower_pag1.html

Tower Of Babel >> T Words
Tower Of Babel, definition of term: Tower Of Babel
tower+of+babel_pag1.html

Tower Of London >> T Words
Tower Of London, definition of term: Tower Of London
tower+of+london_pag1.html