adj. (old colloquial).—1.  Superficial; hackneyed; unbeautiful.

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  1570.  ASCHAM, The Scholemaster, 137. But to dwell in epitomes and books of common places, and not to bind himself daily by orderly study … maketh so many seeming and SUNBURNT ministers as we have; whose learning is gotten in a summer heat, and washed away with a Christmas snow again.

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  1612.  WEBSTER, The White Devil, v. 1.

          Zanche.  It is a dowry,
Methinks should make that SUN-BURNT proverb false,
And wash the Æthiop white.

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  1881.  DAVIES, A Supplementary English Glossary, s.v. SUNBURNT. Ascham applies the word curiously to superficial scholars, whose mind receives as transient an impression from what they read as the face does from exposure to the summer sun.

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  2.  (old).—‘Having many (male) children’ (B. E. and GROSE); and (3) ‘CLAPPED’ (GROSE).

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