Sellout vs. Sell Out
“Sellout” is a closed noun and adjective in Cambridge’s main dictionary, while Business English also documents “sell-out” as a noun variant. “Sell out” is the two-word phrasal verb.
Use “sellout” as the closed noun in Cambridge’s main entry, for example an event with all tickets sold or a perceived betrayal of principles. Cambridge Business English also records the hyphenated noun “sell-out.” Use “sell out” as the phrasal verb.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| noun: an event or product for which all available items/tickets are sold | sellout | Use the closed noun in Cambridge’s main entry. |
| noun: a person or act viewed as betraying principles | sellout | Use the noun; meaning comes from context. |
| verb: exhaust available stock/tickets, or abandon principles | sell out | Use the two-word phrasal verb. |
| Business English noun variant | sell-out | Cambridge also records a hyphenated noun variant in Business English; do not confuse it with the two-word verb. |
Quick tests
Meaning / construction test
Is the expression functioning as a verb?
If yes: Write “sell out” as two words.
If no: For the noun, Cambridge’s main entry uses “sellout”; a hyphenated noun “sell-out” is also documented in Business English.
Caveat: The spelling distinction is mainly word class. The noun also has more than one sense, so context still matters.
Examples
The final concert was a sellout.
“Sellout” is the noun naming an event with all tickets sold.
The shop sold out of the limited edition by noon.
“Sold out” is the phrasal verb.
Critics called the decision a sellout of the group’s principles.
The closed noun can also carry the betrayal sense.
Further guidance
Core difference
Use the documented noun or modifier form when naming a thing, result, event, or concept; use the spaced form when the words function as a verb.
Fast Test
If the expression can take ordinary verb tense or inflection in the sentence, the spaced verb form is usually the relevant choice.
Variant Boundary
Cambridge records closed “sellout” as a noun/adjective and also documents hyphenated “sell-out” as a Business English noun; the phrasal verb is “sell out.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- SELLOUT — English meaning (opens in a new tab)Cambridge Dictionary · Closed noun/adjective “sellout”
- SELL OUT — English meaning (opens in a new tab)Cambridge Dictionary · Two-word phrasal verb and documented Business English noun variant “sell-out”