An onion is a common vegetable grown for its round ediblesafe and suitable to eat bulba rounded underground part of a plant that stores food. It also names the plant itself, so the word can referto mean or point to something to either the vegetable or the plant that produces it.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /ˈʌnjən/
Easy pronunciation: UN-yun (approximate spelling).
Stress: Stress the first syllable.
Use this for the edible bulb of the onion plant.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Onion Meaning
the round edible part of the onion plant
Part of speech: noun
Definition: the bulb of an onion plant, eaten as a vegetable
Example: She chopped an onion and added it to the soup.
Synonyms for this meaning:
- allium cepa — Scientific name for the plant, but not a normal everyday substitute.
- onion plant — Refers to the plant, so it is only a partial substitute for the edible bulb.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Other Meanings of Onion
Meaning 2
the plant that grows onions
Part of speech: noun
Definition: a bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb
Example: He grows onions in a small vegetable patch.
Synonyms for this meaning:
- allium cepa — Scientific name for the plant.
- onion plant — Direct substitute for the plant sense.
Meaning 3
a pungent vegetable used to add flavor to food
Part of speech: noun
Definition: an aromatic flavorful vegetable
Example: The stew gets its flavor from onions and garlic.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Onion Synonyms
Similar Meaning
- onion plant
the plant that grows onions
- onion plant
- allium cepa
the edible bulb of the plant
- allium cepa
Reviewed with OpenAI Decisions. Assessment: inaccurate — correction needed. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Common Mistakes
- Using allium cepa as a normal everyday synonym in casual writing.
- Confusing the plant with the bulb, which are closely related but not exactly the same sense.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does onion mean?
Onion usually means the round edible bulb used in cooking. It can also mean the plant that produces that bulb.
What are the synonyms of onion?
For the plant sense, onion plant is a direct synonym. Allium cepa is the scientific name, so it is accurate but not a common everyday synonym.
Is onion the same as onion plant?
Not exactly. Onion plant refers to the whole plant, while onion often refers to the edible bulb.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-22. AI assessment; not a guarantee of accuracy.
