delta
noun
the fourth letter of the Greek alphabet (Δ, δ).
deltas
-
pluralof delta.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The world-renowned site features iron carbonate concretions that formed some 309 million years ago, fossilizing within them ancient creatures that had once thrived in the area's lush swamps, shallow seas and river deltas.
From Barron's ● Jun. 18, 2026
A new study published in Nature finds that many of the world's largest river deltas are subsiding more quickly than global sea levels are rising, putting hundreds of millions of people at potential risk.
From Science Daily ● Apr. 20, 2026
Over time, sediment carried by rivers built deltas at the head of the Gulf, cutting off tidal access to inland areas.
From Science Daily ● Oct. 27, 2025
"Centimeters of sea level rise will greatly increase the risk of flooding in deltas," Lin said.
From Science Daily ● Oct. 23, 2025
Her eyes were the same deep-set smiles as her son’s, with more extensive deltas of creases at the corners.
From "Strange the Dreamer" by Laini Taylor
