The Collaborative International Dictionary of English v.0.48:

Mot \Mot\ (m[o^]t; m[-o], def. 2), n. [F. See Motto.]
   1. A word; hence, a motto; a device. [Obs.] --Bp. Hall.
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            Tarquin's eye may read the mot afar.  --Shak.
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   2. A pithy or witty saying; a witticism. [A Gallicism]
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            Here and there turns up a . . . savage mot. --N.
                                                  Brit. Rev.
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   3. A note or brief strain on a bugle. --Sir W. Scott.
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The Collaborative International Dictionary of English v.0.48:

Mot \Mot\ (m[=o]t), v. [Sing. pres. ind. Mot, Mote, Moot
   (m[=o]t), pl. Mot, Mote, Moote, pres. subj. Mote;
   imp. Moste.] [See Must, v.] [Obs.]
   May; must; might.
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         He moot as well say one word as another  --Chaucer.
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         The wordes mote be cousin to the deed.   --Chaucer.
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         Men moot [i.e., one only] give silver to the poore
         freres.                                  --Chaucer.
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   So mote it be, so be it; amen; -- a phrase in some rituals,
      as that of the Freemasons.
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WordNet (r) 3.0 (2006):

mot
    n 1: a clever remark [syn: bon mot, mot]
    2: a compulsory annual test of older motor vehicles for safety
       and exhaust fumes [syn: MOT, MOT test, Ministry of
       Transportation test]