The Collaborative International Dictionary of English v.0.48:

Tend \Tend\, v. i. [F. tendre, L. tendere, tensum and tentum, to
   stretch, extend, direct one's course, tend; akin to Gr. ? to
   stretch, Skr. tan. See Thin, and cf. Tend to attend,
   Contend, Intense, Ostensible, Portent, Tempt,
   Tender to offer, Tense, a.]
   1. To move in a certain direction; -- usually with to or
      towards.
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            Two gentlemen tending towards that sight. --Sir H.
                                                  Wotton.
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            Thus will this latter, as the former world,
            Still tend from bad to worse.         --Milton.
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            The clouds above me to the white Alps tend. --Byron.
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   2. To be directed, as to any end, object, or purpose; to aim;
      to have or give a leaning; to exert activity or influence;
      to serve as a means; to contribute; as, our petitions, if
      granted, might tend to our destruction.
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            The thoughts of the diligent tend only to
            plenteousness; but of every one that is hasty only
            to want.                              --Prov. xxi.
                                                  5.
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            The laws of our religion tend to the universal
            happiness of mankind.                 --Tillotson.
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The Collaborative International Dictionary of English v.0.48:

Tend \Tend\, v. t. [See Tender to offer.] (O. Eng. Law)
   To make a tender of; to offer or tender. [Obs.]
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The Collaborative International Dictionary of English v.0.48:

Tend \Tend\, v. t. [imp. & p. p. Tended; p. pr. & vb. n.
   Tending.] [Aphetic form of attend. See Attend, Tend to
   move, and cf. Tender one that tends or attends.]
   1. To accompany as an assistant or protector; to care for the
      wants of; to look after; to watch; to guard; as, shepherds
      tend their flocks. --Shak.
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            And flaming ministers to watch and tend
            Their earthly charge.                 --Milton.
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            There 's not a sparrow or a wren,
            There 's not a blade of autumn grain,
            Which the four seasons do not tend
            And tides of life and increase lend.  --Emerson.
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   2. To be attentive to; to note carefully; to attend to.
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            Being to descend
            A ladder much in height, I did not tend
            My way well down.                     --Chapman.
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   To tend a vessel (Naut.), to manage an anchored vessel when
      the tide turns, so that in swinging she shall not entangle
      the cable.
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The Collaborative International Dictionary of English v.0.48:

Tend \Tend\, v. i.
   1. To wait, as attendants or servants; to serve; to attend;
      -- with on or upon.
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            Was he not companion with the riotous knights
            That tend upon my father?             --Shak.
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   2. [F. attendre.] To await; to expect. [Obs.] --Shak.
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WordNet (r) 3.0 (2006):

tend
    v 1: have a tendency or disposition to do or be something; be
         inclined; "She tends to be nervous before her lectures";
         "These dresses run small"; "He inclined to corpulence"
         [syn: tend, be given, lean, incline, run]
    2: have care of or look after; "She tends to the children"
    3: manage or run; "tend a store"