GNU Collaborative International Dictionary of English

Found one definition

  1.       
    Mar, v. t. [imp. & p. p. Marred (märd); p. pr. & vb. n. Marring.] [OE. marren, merren, AS. merran, myrran (in comp.), to obstruct, impede, dissipate; akin to OS. merrian, OHG. marrjan, merran; cf. D. marren, meeren, to moor a ship, Icel. merja to bruise, crush, and Goth. marzjan to offend.  Cf. Moor, v.]
    1. To make defective; to do injury to, esp. by cutting off or defacing a part; to impair; to disfigure; to deface.

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    I pray you mar no more trees with wiring love songs in their barks. Shak.

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    But mirth is marred, and the good cheer is lost. Dryden.

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    Ire, envy, and despair

    Which marred all his borrowed visage. Milton.

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    2. To spoil; to ruin. “It makes us, or it mars us.” “Striving to mend, to mar the subject.” Shak.

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