Have you heard of Julian Assange’s surfraw?

  $ alias d='sr duckduckgo -text -ducky'
  $ d '!man surfraw'

  [www-browser opens http://manpages.org/surfraw]
  […]
  DESCRIPTION

   Surfraw provides a fast unix command line interface to a variety of popular WWW search engines and other artifacts of power. It reclaims google, altavista, dejanews, freshmeat, research index, slashdot and many others from the false-prophet, pox-infested heathen lands of html-forms, placing these wonders where they belong, deep in unix heartland, as god loving extensions to the shell.
  […]

Edit: even better, dict(1) (or GNU dico):

  $ dict foo # same text as !dict’s http://dict.org/bin/Dict?Form=Dict2&Database=*&Query=foo