code
Pluralcodes
Pluralcodes
- 1A group of letters, numbers, or symbols used to name or stand for something, like a product, place, or key.
Like a nickname that stands for a longer, fuller name.
Each product in the catalog has its own code.
The clerk typed the code to look up my order.
UsageSay enter the code or type the code.
Similaridentifier, symbol, label
- 2Instructions that tell a computer what to do, written in a programming language.
Like a recipe that tells a computer exactly which steps to follow.
She wrote the code for the login page over the weekend.
The code wouldn't compile because a semicolon was missing.
UsageSay write code or a piece of code.
Similarsoftware
- 3
- 4A set of laws written down and arranged in a clear order.
Like a single rulebook for a whole country, gathered in one place.
The criminal code sets out penalties for theft and assault.
Lawmakers revised the tax code during the last session.
UsageSay the tax code or the criminal code.
Similarlaw, regulations, legislation, statute
Note
- 5
- 6
- 7To change a message into a secret form that others cannot read.
Like writing a letter in a secret language only your friend can read.
Spies code their letters so enemies can't read them.
She learned how to code secret messages for fun.
UsageEncode means the same: code a message.
Similarencode, encrypt, encipher
Oppositedecode, decrypt, decipher
Note
- 8To carry the genetic instructions for making a particular protein.
Like a recipe inside your cells that tells the body how to build one part.
These genes code for proteins the body needs every day.
A single gene can code for one protein.
UsageSay a gene codes for a protein.
Similarencode
Note
- 9To give things labels or numbers from a set list so they can be sorted.
Like sticking colored labels on papers so you can group them quickly.
We code the answers so we can count them by group.
She codes the notes by topic before the meeting.
UsageSay you code answers by group or topic.
Similartag, label, categorize, classify
- 10A secret way of writing messages so others cannot read them, or a message written that way.
Like a secret word list that only you and your friend have.
In the army's code, the word "apple" meant "tank," and every officer had a book to check it.
When the enemy found the book, the whole code was useless.
UsageSay a message is in code, and people crack the code.
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Less common meanings
- 11Of a sick person, to suddenly have a deadly emergency, like the heart stopping.
Like an alarm going off suddenly when something goes very wrong.
Patients can code without any warning at all.
She coded soon after surgery, and the team revived her.
UsageThis is hospital talk. In everyday English, say their heart stopped or they stopped breathing.
Note
- 12An emergency in a hospital that calls trained staff to help right away.
Like a fire alarm that calls the right people to act fast.
A code was called on the third floor, and the team rushed in.
She responded to every code during her night shift.
UsageSay staff call a code.
Note
- 13To call for an emergency team in a hospital when a patient is in danger.
Like pulling a fire alarm so help comes right away.
The nurse coded the patient when his heart stopped.
If her breathing stops, code her right away.
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- 14A particular language or way of speaking that a group of people uses.
Many kids switch codes, speaking Spanish at home and English at school.
Linguists study how bilingual speakers choose one code over another.
UsageSay people switch codes between languages.
Similarlanguage, variety, dialect, register
Note
Showing meanings only.
Practice
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Origins
It came from Latin "cōdex," a form of "caudex," meaning a tree stem or a wooden tablet covered with wax for writing on, and so later a book. It reached English through Old French "code," meaning a system of law.
Checked 31 Oct 2026 · 5 facts
- English code derives from Latin cōdex through Old French. fr.wiktionary.org
- Cōdex is a form of caudex. en.wiktionary.org
- Caudex meant a tree stem. alatius.com
- Caudex also referred to wax-covered wooden writing tablets, leading to the meaning book. alatius.com
- English received the word through Old French code, meaning a system of law. en.wiktionary.org
It comes from "code blue," a term for a medical emergency.
Checked 31 Oct 2026 · 2 facts
- The medical sense of code comes from code blue. en.wiktionary.org
- Code blue denotes a medical emergency. en.wiktionary.org