Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “oxygen”

See all translations

oxygen

noun [U] uk   /ˈɒk.sɪ.dʒən/ us    /ˈɑːk-/ ( symbol O)
B2 a chemical element that is a gas with no smell or colour. Oxygen forms a large part of the air on Earth, and is needed by animals and plants to live.
More examples
Translations of “oxygen”
in Korean 산소…
in Arabic أوكْسيجين…
in French oxygène…
in Turkish oksijen…
in Italian ossigeno…
in Chinese (Traditional) 氧,氧氣…
in Russian кислород…
in Polish tlen…
in Spanish oxígeno…
in Portuguese oxigênio…
in German der Sauerstoff…
in Catalan oxigen…
in Japanese 酸素…
in Chinese (Simplified) 氧,氧气…
(Definition of oxygen from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of oxygen?
Add Cambridge dictionaries to your browser to your website

Definitions of “oxygen” in other dictionaries

Word of the Day

thug

a man who acts violently, especially to commit a crime

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More