What does 独り mean?
独り is a Japanese noun meaning “alone, unmarried” in English. It can also be translated as “being alone, being single, by oneself” depending on context. It is written as 独り in kanji, ひとり in hiragana, and hitori in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
彼はひとりになると即座にその手紙を開いた。
The moment that he was alone he opened the letter.