Source : Webster's Revised Unabridged Dictionary (1913)

Greet \Greet\, a.
   Great. [Obs.] --Chaucer.

Greet \Greet\, v. i. [OE. greten, AS. gr[=ae]tan, gr[=e]tan;
   akin to Icel. gr[=a]ta, Sw. gr[*a]ta, Dan. gr[ae]de, Goth.
   gr[=e]ctan; cf. Skr. hr[=a]d to sound, roar. [root]50.]
   To weep; to cry; to lament. [Obs. or Scot.] [Written also
   {greit}.] --Spenser.

Greet \Greet\, n.
   Mourning. [Obs.] --Spenser.

Greet \Greet\, v. t. [imp. & p. p. {Greeted}; p. pr. & vb. n.
   {Greeting}.] [OE. greten, AS. gr[=e]tan to address, approach;
   akin to OS. gr[=o]tian, LG. gr["o]ten, D. groeten, OHG.
   gruozzen, G. gr["u]ssen. [root]50.]
   1. To address with salutations or expressions of kind wishes;
      to salute; to hail; to welcome; to accost with friendship;
      to pay respects or compliments to, either personally or
      through the intervention of another, or by writing or
      token.

            My lord, the mayor of London comes to greet you.
                                                  --Shak.

   2. To come upon, or meet, as with something that makes the
      heart glad.

            In vain the spring my senses greets.  --Addison.

   3. To accost; to address. --Pope.

Greet \Greet\, v. i.
   To meet and give salutations.

         There greet in silence, as the dead are wont, And sleep
         in peace.                                --Shak.

Greet \Greet\, n.
   Greeting. [Obs.] --F. Beaumont.

Source : WordNet®

greet
     v 1: express greetings upon meeting someone [syn: {recognize}, {recognise}]
     2: send greetings to
     3: react to in a certain way; "The President was greeted with
        catcalls"
     4: be perceived by; "Loud music greeted him when he entered the
        apartment"