"capstone" means: Any of the stones making up the top layer of a wall; a coping stone.. This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.
capstone
Any of the stones making up the top layer of a wall; a coping stone.
Seen in the wild
7 citations · last seen May 2026
Seen in the wild
BlueskyMay 2026
#CAPS Capstone Publishes Investor FAQ Detailing 72% Reduction in Convertible Principal and Reaffirming FY2026 Guidance https://www.stocktitan.net/news/CAPS/capstone-publishes-investor-faq-detailing-72-reduction-in-ud…
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BlueskyMay 2026
51) Limbus Company - Twinning Threads (10/10) Favorite intervallo so far. Continues the exploration into Ryoshu and her relationship with the Nursefathers as well as where she goes on from here. Also a fantastic caps…
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BlueskyMay 2026
I got positive feedback from my advisor on my MFA capstone (which also happens to be part 1 of my first novel). That means outside of some bureaucratic nonsense I’m done with my thesis! Huzzah.🎉
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BlueskyMay 2026
Limbus dropping the season capstone ryoshu the banner right after ricardocliff is evil ngl. Get em to waste all their lunacy on the funny hair coupon man before dropping the Real Shit
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BlueskyMay 2026
I gotta see what kinda crack shit they do with her capstone
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Definitions
#1·Apr 27, 2026
Any of the stones making up the top layer of a wall; a coping stone.
Origin: From ; equivalent to. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents
"capstone" means: Any of the stones making up the top layer of a wall; a coping stone.. This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.
For ESL learners
"capstone" means: Any of the stones making up the top layer of a wall; a coping stone.. Register: neutral, standard English, usable in most everyday contexts. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.
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#2·Apr 27, 2026
(figurative) A crowning achievement, culmination or finishing touch.
Cluster: general
Heard in the wild
“I got positive feedback from my advisor on my MFA capstone (which also happens to be part 1 of my first novel). That means outside of some bureaucratic nonsense I’m done with my thesis! Huzzah.🎉”
— Bluesky· May 2026“Limbus dropping the season capstone ryoshu the banner right after ricardocliff is evil ngl. Get em to waste all their lunacy on the funny hair coupon man before dropping the Real Shit”
— Bluesky· May 2026“I gotta see what kinda crack shit they do with her capstone”
— Bluesky· May 2026“👏 Capstone and Maris Education want to thank the WEMTA membership for all your great work and expertise on behalf of your school districts. Thank you for all that you do for your students! Learn more here: bit.ly/49ge8yx”
— Bluesky· May 2026“IT CAN'T BE THEY SAID HER CAPSTONE WILL INTERACT WITH ALL THE NURSEFATHERS THIS WOULD BE LIKE GIVING HONG LU A HEISHOU AND THEN LORD LU”
— Bluesky· May 2026
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#3·Apr 27, 2026
(transitive) To complete as a crowning achievement; to top off.
Heard in the wild
“#CAPS Capstone Publishes Investor FAQ Detailing 72% Reduction in Convertible Principal and Reaffirming FY2026 Guidance https://www.stocktitan.net/news/CAPS/capstone-publishes-investor-faq-detailing-72-reduction-in-udc3m59k3p6e.html”
— Bluesky· May 2026“51) Limbus Company - Twinning Threads (10/10) Favorite intervallo so far. Continues the exploration into Ryoshu and her relationship with the Nursefathers as well as where she goes on from here. Also a fantastic capstone for Gregor's arc up to this point. Amazing stuff here.”
— Bluesky· May 2026
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For specific readers
Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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Other words near "capstone" (C)
capologycap oncaponomicscappingCapricapsicumCaptain ArmstrongCaptain Cookcaptain save a hoecaptain's callCaptain's Cloakcaptain's daughter
Browse all slang words starting with C.