Quadrillion means: Any very large number, exceeding normal description.. It is informal slang, fine in casual speech but not suited to formal contexts. 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.
quadrillion
(figuratively, slang, hyperbole) Any very large number, exceeding normal description.
Definitions
UK
#1·Apr 27, 2026UK
(figuratively, slang, hyperbole) Any very large number, exceeding normal description.
For parents
Quadrillion means: Any very large number, exceeding normal description.. It is informal slang, fine in casual speech but not suited to formal contexts. 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
quadrillion means: Any very large number, exceeding normal description.. Register: very informal, slang. Suitable only for casual conversation, chat and social media. Do not use in business, academic or news writing. 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.
Was this helpful?
Comments
UK
#2·Apr 27, 2026UK
(US, modern British and Australian, short scale) A thousand trillion (logic: 1,000 × 1,0004): 1 followed by fifteen zeros, 1015.
Was this helpful?
Comments
UK
#3·Apr 27, 2026UK
(dated, UK, Australia, long scale) A million trillion (logic: 1,000,0004): 1 followed by twenty-four zeros, 1024.
Heard in the wild
“Major institutional validation. DTCC processes roughly $2 quadrillion in securities annually - any tokenization infrastructure from them would be transformative for settlement efficiency and the RWA narrative.”
— Bluesky· May 2026
Was this helpful?
Comments
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.
Used in
UK
Have a better definition?
Add your own interpretation of "quadrillion".
🇦🇺About Australian & NZ slang slang
Aussie and Kiwi vocabulary — bogan, daggy, brekkie, sheila, bach, jandals — the whole Antipodean lexicon, including outback dialect, surf and beach culture, and Sydney/Melbourne street slang.
See all Australian & NZ slang slang on Slangora.
Tags
Other words near "quadrillion" (Q)
quaddiequad meetquadplexquadpotquadrellaquadriadquadrominiumquadroonquadruple whole notequahoggerquaichQuailgate
Browse all slang words starting with Q.
Related terms
People also read
Semantically related
- quintillion88%
(figuratively, slang, hyperbole) Any very large number, exceeding normal description.
- quintillion82%
(colloquial, hyperbole) An unspecified very large number.
- trillion79%
(colloquial, hyperbole) An unspecified very large number.
- quintillion76%
Either of two very large amounts.
- novemdecillion75%
(colloquial, hyperbole) A very large but unspecified number (of).