Delta
noun /ˈdɛltə/ — Where a river fans out into the sea — the end of the journey, made many.
Definition
A triangular area of low, flat land formed by deposits of silt at the mouth of a river, where it divides into several smaller rivers before entering the sea.
Beyond the definition
A delta is the river's final gesture — it has traveled so far that at the end, it spreads itself open and releases into something larger. Geographically, it is one of the most fertile places on earth. Metaphorically, it is the image of dispersal after long focus.
Origin & history
From Greek delta — the fourth letter of the Greek alphabet (Δ), which is triangular. The river's mouth named for the shape it makes — an entire landform named for a letter.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The Nile Delta fed a civilization for three thousand years — the river's gift given at its end.
She thought about the delta of a life: all the tributaries leading to this spreading out, this dispersal.
The river arrived at the delta changed — slower, quieter, the force of its early journey spent.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Delta” when the meaning fits your context: A triangular area of low, flat land formed by deposits of silt at the mouth of a river, where it divides into several smaller rivers before entering the sea.
Synonyms
river mouth, estuary, alluvial plain
Antonyms
source, headwater
Related words
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Water flowing through sediment
A botanical composition featuring a stream near the roots of a tree, where water deposits silt into the soil.
The depositing of silt and water at the base of the tree is a conceptual analogy for a river delta, where water divides and deposits material.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Delta" mean?
Delta is noun meaning: Where a river fans out into the sea — the end of the journey, made many.. A triangular area of low, flat land formed by deposits of silt at the mouth of a river, where it divides into several smaller rivers before entering the sea.
Where does the word "Delta" come from?
From Greek delta — the fourth letter of the Greek alphabet (Δ), which is triangular. The river's mouth named for the shape it makes — an entire landform named for a letter.