Definitions

1. noun

the dry, granular excrement of birds, especially seabirds, used as fertilizer.

“The farmer applied guano to his fields to increase crop yields.”

2. noun

any of various other excrements used as fertilizer, such as bat guano.

“The mine produced a valuable source of guano that was used to fertilize crops.”

3. verb

to cover or coat with guano.

“The island’s beaches were guanod with the droppings of the large seabird colony.”