Definition of guano in English:


Syllabification: gua·no
Pronunciation: /ˈgwänō

noun (plural guanos)

  • 1The excrement of seabirds and bats, used as fertilizer.
    More example sentences
    • Millennia of visiting seabirds left large fossilized guano deposits on Nauru.
    • The copious guano deposition from sea birds may play a role in maintaining the present assemblage of vascular plants on both islands.
    • They rip up bin bags, deposit vast quantities of guano on our favourite statuary, and even attack people.
  • 1.1An artificial fertilizer resembling natural guano, especially one made from fish.


early 17th century: from Spanish, or from Latin American Spanish huano, from Quechua huanu 'dung'.

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