psi
Spanish, noun/ˈsi/
psi is spelled P-S-I (3 letters) and appears about once in every 1 million words in written Spanish, the 36,450th most frequent Spanish word form (wordfreq, 2021 data). Psi is a Spanish feminine noun meaning “psi; the Greek letter Ψ, ψ” (English Wiktionary, September 2026). The Spanish Wiktionary (Wikcionario) defines it as “Letra del alfabeto griego (Ψψ)”.
What does psi mean in English?
noun
- 1
femininepsi; the Greek letter Ψ, ψ
Source: English Wiktionary, Spanish section, dump of September 2, 2026 (CC BY-SA 4.0).
How Spanish dictionaries define it
noun: 1. Letra del alfabeto griego (Ψψ).
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 psi
- psíes plural
- psis plural
Source: English Wiktionary and Spanish Wiktionary (Wikcionario) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce psi?
- /ˈsi/
- [ˈsi]
Sources: English Wiktionary, Spanish Wiktionary (Wikcionario) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to psi
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is psi in Spanish?
psi appears about once in every 1 million words in written Spanish.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).