1. [n]  an unknown and unpredictable phenomenon that causes an event to result one way rather than another; "bad luck caused his downfall"; "we ran into each other by pure chance"
2. [n]  an unknown and unpredictable phenomenon that leads to a favorable outcome; "it was my good luck to be there"; "they say luck is a lady"; "it was as if fortune guided his hand"
3. [n]  a large amount of wealth or prosperity
4. [n]  your overall circumstances or condition in life (including everything that happens to you); "whatever my fortune may be"; "deserved a better fate"; "has a happy lot"; "the luck of the Irish"; "a victim of circumstances"; "success that was her portion"

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1. \For"tune\ (f[^o]r"t[-u]n; 135), n. [F. fortune, L.
   fortuna; akin to fors, fortis, chance, prob. fr. ferre to
   bear, bring. See {Bear} to support, and cf. {Fortuitous}.]
   1. The arrival of something in a sudden or unexpected manner;
      chance; accident; luck; hap; also, the personified or
      deified power regarded as determining human success,
      apportioning happiness and unhappiness, and distributing
      arbitrarily or fortuitously the lots of life.
            'T is more by fortune, lady, than by merit. --Shak.
            O Fortune, Fortune, all men call thee fickle.
                                                  --Shak.
   2. That which befalls or is to befall one; lot in life, or
      event in any particular undertaking; fate; destiny; as, to
      tell one's fortune.
            You, who men's fortunes in their faces read.
                                                  --Cowley.
   3. That which comes as the result of an undertaking or of a
      course of action; good or ill success; especially,
      favorable issue; happy event; success; prosperity as
      reached partly by chance and partly by effort.
            Our equal crimes shall equal fortune give. --Dryden.
            There is a tide in the affairs of men, Which, taken
            at the flood, leads on to fortune.    --Shak.
            His father dying, he was driven to seek his fortune.
                                                  --Swift.
   4. Wealth; large possessions; large estate; riches; as, a
      gentleman of fortune.
   Syn: Chance; accident; luck; fate.
   {Fortune book}, a book supposed to reveal future events to
      those who consult it. --Crashaw.
   {Fortune hunter}, one who seeks to acquire wealth by
      marriage.
   {Fortune teller}, one who professes to tell future events in
      the life of another.
   {Fortune telling}, the practice or art of professing to
      reveal future events in the life of another.
   

2. \For"tune\, v. t. [OF. fortuner, L. fortunare. See
   {Fortune}, n.]
   1. To make fortunate; to give either good or bad fortune to.
      [Obs.] --Chaucer.
   2. To provide with a fortune. --Richardson.
   3. To presage; to tell the fortune of. [Obs.] --Dryden.
   

3. \For"tune\, v. i.
   To fall out; to happen.
         It fortuned the same night that a Christian, serving a
         Turk in the camp, secretely gave the watchmen warning.
                                                  --Knolles.