red-eye

Meaning

Noun

1. (countable, uncountable) Any of various animals that have red eyes.
2. (countable, uncountable) Any of various animals that have red eyes.
3. (countable, uncountable) Any of various animals that have red eyes.
4. (Australia, countable, uncountable) Any of various animals that have red eyes.
5. (Canada, US, countable, uncountable) Any of various animals that have red eyes.
6. (South-Africa, US, countable, uncountable) Any of various animals that have red eyes.
7. (US, countable, uncountable) Any of various animals that have red eyes.
8. (US, countable, uncountable) Any of various animals that have red eyes.
9. (countable, uncountable) Any of various animals that have red eyes.
10. (countable, uncountable) Types of beverages or sauces.
11. (Canada, countable, regional, uncountable) Types of beverages or sauces.
12. (US, countable, slang, uncountable) Types of beverages or sauces.
13. (abbreviation, alt-of, countable, ellipsis, uncountable) Types of beverages or sauces.
14. (US, also, attributive, colloquial, countable) An overnight airplane flight or train trip.
15. (countable, uncountable) Redness of the conjunctiva; especially when caused by conjunctivitis (pink-eye).
16. (countable, uncountable) Redness in the eye(s) of someone in a colour photograph, as an unwanted consequence of light from a flash reflecting off blood vessels in the retina.

Verb

Often followed by it: to travel on a red-eye (“an overnight airplane flight”).

Synonyms

conjunctivitis

Pronounced as (IPA)

/ˈɹɛdaɪ/

Etymology

The noun is derived from red + eye; sense 2.3 (“strong but poor-quality whiskey”) and sense 3 (“overnight airplane flight”) are probably so named because they may cause people to develop bloodshot eyes.
The verb is derived from the noun.