oxygen
nounUK /ˈɒk.sɪ.dʒən/
US /ˈɑːk.sɪ.dʒən/
Oxygen is a gas in the air that people and animals need to breathe and stay alive.
The diver carried a tank of oxygen so he could breathe underwater.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A chemical element with the symbol O and atomic number 8.
Water is made of hydrogen and oxygen.
3. A supply or treatment of oxygen used in medicine.
The patient was given oxygen after the accident.
4. The part of the air that supports burning.
Without oxygen, a fire cannot keep burning.
5. Fresh air or a breath of air, especially in informal use.
After the long meeting, she stepped outside for some oxygen.