smart

Concise Oxford English Dictionary © 2008 Oxford University Press:
smart/smɑːt/

▶adjective

• 1 clean, tidy, and stylish.

• 2 bright and fresh in appearance.

• 3 (of a place) fashionable and upmarket.

• 4 informal having a quick intelligence.

  ■ (of a device) programmed so as to be capable of independent action.

  ■ chiefly N. Amer. impertinently clever or sarcastic.

• 5 quick; brisk.

▶verb

• 1 give a sharp, stinging pain.

• 2 feel upset and annoyed.

▶noun

• 1 (smarts) N. Amer. informal intelligence; acumen.

• 2 a smarting pain.

– phrases
look smart chiefly Brit. be quick.

– derivatives
smarting adjective,
smartingly adverb,
smartly adverb,
smartness noun.

– origin OE smeortan (v.), of W. Gmc origin.