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delta

A landform at the mouth of a river where it empties into a body of water.

ˈdɛltəCurrent182 viewsLast reviewed Jun 29, 2026+ Add a definition
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12 citations · last seen May 2026

Seen in the wild

Definitions

US
#1·Apr 27, 2026US

A landform at the mouth of a river where it empties into a body of water.

ΔV - "delta vee"(change in velocity, used in rocketry and orbital mechanics)
Heard in the wild
  • “....they should? American, Delta and United all have non-stops from IAH to LAX. I can look closer through my work stuff later if you would like”

    — Bluesky· May 2026
  • “🇦🇺 Eurovision 2026: Photos from Delta Goodrem's first rehearsal for Australia!! www.aussievision.net/post/eurovis...”

    — Bluesky· May 2026
  • “4️⃣: Sinners (2025 film) "Sinners is a 2025 American horror film produced, written, and directed by Ryan Coogler. Set in 1932 in the Mississippi Delta, it stars Michael B. Jordan in dual roles..." #TopWikiPages 🧵 6/7 https://en.wikipedia.org/wiki/Sinners_(2025_film)”

    — Bluesky· May 2026
  • “How Shell is still benefiting from offloaded Niger Delta oil assets ->Climate Home News | More on "Shell Niger Delta gas flaring" at BigEarthData.ai”

    — Bluesky· May 2026
  • “Delta ending food and beverage service on shorter flights www.youtube.com/watch?v=BlJ0...”

    — Bluesky· May 2026
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US
#2·Apr 27, 2026US

The fourth letter of the modern Greek alphabet Δ, δ.

Origin: From , borrowed from a Phoenician word for "door", ultimately from . . * (river): from the triangular shape of the majuscule Greek letter delta Δ * (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents

Delta means: The fourth letter of the modern Greek alphabet Δ, δ.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

For ESL learners

delta means: The fourth letter of the modern Greek alphabet Δ, δ.. Register: neutral, standard English. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself. A formal-English equivalent (a synonym or descriptive phrase) is usually safer in writing. When in doubt, paraphrase rather than reuse the slang form.

Cluster: general
Heard in the wild
  • “Delta Air Lines is making changes to its onboard service that will affect passengers on shorter flights this summer.”

    — Bluesky· May 2026
  • “I see it! An A330 ... Delta....”

    — Bluesky· May 2026
  • “Delta to cut food service on hundreds of daily flight:https://www.wkyt.com/2026/05/05/delta-cut-food-service-hundreds-daily-flights/”

    — Bluesky· May 2026
  • “Delta dropping complimentary food, drink service on select flights #TheHill”

    — Bluesky· May 2026
  • “I feel like there's an endless amount of post punk bands to discover. When I saw Folk Implosion Lou Barlow mentioned Delta 5 from Leeds who are great and all of that to say I finally got a copy of their best of on CD.”

    — Bluesky· May 2026
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US
#3·Apr 27, 2026US

(mathematics, physics, engineering) The symbol Δ; A change in a quantity, likely from "d" for "difference".

This will slow the main code path down, but only by delta.
Heard in the wild
  • “DSN S5E16, I'm afraid Delta Flyers weren't watching earlier SNW where Khan is brought up pre eugenics wars and there are multiple augment characters, and augment blood is being used in medical procedures. (ENT handled augments a bit weirdly.)”

    — Bluesky· May 2026
  • “I'm starting to see it in sales. Delta is offering extended bonuses which they used to do for like~3-4 weeks, they are now doing it through November.”

    — Bluesky· May 2026
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