とは

Japanese

Particle

とは (rōmaji to wa)

1. indicates that a word or a phrase is to be defined
素数 (そすう)とは (なに)かを (まな)んだ。
Sosū to wa nani ka o mananda.
I learnt what a prime number was.
Ubuntuとは
Ubuntu to wa?
What is Ubuntu?

Usage notes

• This particle is e.g. often used in encyclopedias to define entries.
• When used alone with a word it denotes the meaning of "this word is defined as?" and may be translated as "about" or "What is".