1. [n]  a line that divides two adjacent river systems
2. [v]  perform a division; "Can you divide 49 by seven?"
3. [v]  separate into parts or portions; "divide the cake into three equal parts"; "The British carved up the Ottoman Empire after World War I"
4. [v]  force, take, or pull apart; "He separated the fighting children"; "Moses parted the Red Sea"
5. [v]  come apart; "The two pieces that we had glued separated"
6. [v]  make a division or separation
7. [v]  act as a barrier between; stand between; "The mountain range divides the two countries"

Divide
Produced by a secret government research project, John Shaw finds himself abandoned when the funding runs out and his mind begins to assume a new, alien personality

more details ...

1. \Di*vide"\, v. t. [imp. & p. p. {Divided}; p. pr. & vb.
   n. {Dividing}.] [L. dividere, divisum; di- = dis- + root
   signifying to part; cf. Skr. vyadh to pierce; perh. akin to
   L. vidua widow, and E. widow. Cf. {Device}, {Devise}.]
   1. To part asunder (a whole); to sever into two or more parts
      or pieces; to sunder; to separate into parts.
            Divide the living child in two.       --1 Kings iii.
                                                  25.
   2. To cause to be separate; to keep apart by a partition, or
      by an imaginary line or limit; as, a wall divides two
      houses; a stream divides the towns.
            Let it divide the waters from the waters. --Gen. i.
                                                  6.
   3. To make partition of among a number; to apportion, as
      profits of stock among proprietors; to give in shares; to
      distribute; to mete out; to share.
            True justice unto people to divide.   --Spenser.
            Ye shall divide the land by lot.      --Num. xxxiii.
                                                  54.
   4. To disunite in opinion or interest; to make discordant or
      hostile; to set at variance.
            If a kingdom be divided against itself, that kingdom
            can not stand.                        --Mark iii.
                                                  24.
            Every family became now divided within itself.
                                                  --Prescott.
   5. To separate into two parts, in order to ascertain the
      votes for and against a measure; as, to divide a
      legislative house upon a question.
   6. (Math.) To subject to arithmetical division.
   7. (Logic) To separate into species; -- said of a genus or
      generic term.
   8. (Mech.) To mark divisions on; to graduate; as, to divide a
      sextant.
   9. (Music) To play or sing in a florid style, or with
      variations. [Obs.] --Spenser.
   Syn: To sever; dissever; sunder; cleave; disjoin; disunite;
        detach; disconnect; part; distribute; share.
   

2. \Di*vide"\, v. i.
   1. To be separated; to part; to open; to go asunder.
      --Milton.
            The Indo-Germanic family divides into three groups.
                                                  --J. Peile.
   2. To cause separation; to disunite.
            A gulf, a strait, the sea intervening between
            islands, divide less than the matted forest.
                                                  --Bancroft.
   3. To break friendship; to fall out. --Shak.
   4. To have a share; to partake. --Shak.
   5. To vote, as in the British Parliament, by the members
      separating themselves into two parties (as on opposite
      sides of the hall or in opposite lobbies), that is, the
      ayes dividing from the noes.
            The emperors sat, voted, and divided with their
            equals.                               --Gibbon.
   

3. \Di*vide"\, n.
   A dividing ridge of land between the tributaries of two
   streams; a watershed.