co
Spanish, noun
co is spelled C-O (2 letters) and appears 35 times per million words in written Spanish, the 2,389th most frequent Spanish word form (wordfreq, 2021 data). Co is a Spanish masculine noun meaning “dude, friend” (English Wiktionary, September 2026). On this page, CO₂ is a different word: “carbon dioxide”. With an accent, có is a different word: “alternative form of cómo”. The Spanish Wiktionary (Wikcionario) defines it as “Chico, ese o tío”.
What does co mean in English?
noun
- 1
colloquialmasculinedude, friend
noun
- 1
masculinecarbon dioxide
prefix
- 1
co-
pronoun
- 1
colloquialalternative form of cómo
Source: English Wiktionary, Spanish section, dump of September 2, 2026 (CC BY-SA 4.0).
How Spanish dictionaries define it
noun: 1. Chico, ese o tío.
abbreviation: 1. Grafía obsoleta de con.
prefix: 1. Indica "junto con" (como en coeficiente), "acción en conjunto" (como en cooperar), "agregado" (como en colección).
The definition in the Spanish Wiktionary (Wikcionario), in Spanish.
Source: Spanish Wiktionary (Wikcionario), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of co
- cos plural
Source: English Wiktionary and Spanish Wiktionary (Wikcionario) (dumps of September 2, 2026 and September 1, 2026).
English words that translate to co
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is co in Spanish?
co appears 35 times per million words in written Spanish.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).