○

A generic circle shape.

○

1. A female family member in a family tree.

   Antonym: □

2. (phonetics) an unidentifiable/indeterminate segment
3. A circled number ①, ②, ③, etc. represents the 1st, 2nd, 3rd, etc. item.
   • 2013, Emily Laurence Baker, Slow New Forest: Local, characterful guides to Britain's special places (in English), Bradt Travel Guides, →ISBN, page 109:

     ④ New Forest Wildlife Park
     Deerleap Lane, Ashurst SO41 4UH Ⓣ 023 […] Ⓦ www.newforestwildlifepark.co.uk

4. A circled letter Ⓐ, Ⓑ, Ⓒ, etc. represents the Ath, Bth, Cth, etc. item.
   • 2004, Faye Berryman, Philip O'Carroll, Fitzroy Word Skills 3 Answer Book (Stories 21-30) (in English), Lai Lai Book Company, →ISBN, page 75:

     Fill each gap below. Use the word from the story.
     Ⓐ It seemed that she just didn't like her toys.
     Ⓑ But her mum answered, “I don't have time...”
     Ⓒ I really like talking.

5. (chemistry, obsolete) oxygen (Daltonian symbol)
6. (go) a white stone

   Antonym: ●

• Circled letters:
  • Ⓐ (“the symbol of anarchism”)
  • Ⓣ (“indicates a phone number”)
  • Ⓦ (“indicates a website”)
  • Ⓧ (“indicates the last date at which the item must be sold at a fixed price under saihan seido, Japan's resale price maintenance system”)
  • Ⓨ (“indicates the first date at which the item must be sold at a fixed price under saihan seido, Japan's resale price maintenance system”)

• Intellectual property symbols:
  • © (“copyright symbol”)
  • ℗ (“sound recording copyright symbol”)
  • ® (“registered trademark symbol”)

Directly from 丸 'circle, circular'.

○(まる) 

1. circle
2. correct, check mark, good

• ×(ばつ) (batsu): incorrect, bad

• ◎(にじゅうまる) (nijūmaru): very good
• △(さんかく) (sankaku): slightly wrong; OK but not great

• ○×

○(まる) or ○(なに) 

1. Placeholder for a kanji or kana.
   1. Used to indicate a space to be filled in.

      ○○が好き

      ______ ga suki

      to like ______

   2. Used to censor or obscure individual characters.

      セッ○ス

      sekkusu

      s*x (sex)

      創○○会

      Sōka Gakkai

      S*k* Gak*i (Soka Gakkai)

      Micr○soft

      Micr*soft

      ち○ぽ

      chi*po

      d**k

      • 2004, 榎本年弥, 旅の指さし会話帳7 オーストラリア: オーストラリア英語‎, Joho Center Publishing, →ISBN, page 122:

        prick………チ○ポコ
        prickhead………バカ野郎

        prick………チ○ポコ
        prickhead………バカ野郎

        dickheadと同じく、「チン○コ頭」の意味。

• 〇 (“zero”, an alternative for 零)
• ほにゃらら (a possible pronunciation for a blanked-out word, such as in ○○が好き above)