□

See also: ☐

□ U+25A1, □ WHITE SQUARE ← ■ [U+25A0] Geometric Shapes ▢ → [U+25A2]

Text style	Emoji style
◻︎	◻️
Text style is forced with ⟨︎⟩ and emoji style with ⟨️⟩.
◻ U+25FB, ◻ WHITE MEDIUM SQUARE ← ◺ [U+25FA] Geometric Shapes ◼ → [U+25FC]

Translingual

Description

A square outline.

Symbol

□

1. (geometry) A quadrilateral, usually referred to a square or rectangle.

   □ABCD

   A quadrilateral with vertices named A, B, C, and D in order.

2. A male family member in a family tree.

   Antonym: ○

3. (logic) logically necessary; provable

   Coordinate term: ◇

   • 2009, Logique et analyse, page 193:

     […] obtained by adding the standard modal operators □ (necessity) and ◇ (possibility) to paralogics.

4. (astrology) quadrature.
5. (alchemy) table salt.

Synonyms

• (alchemy): 🜔

Coordinate terms

• (logical necessity): ◊

Chinese

Wikipedia has an article on:

• 虛缺號

Symbol

□

1. Used as a placeholder for an illegible hanzi or lacuna.
2. Used as a placeholder for an unknown hanzi (as when discussing dialectal morphemes).
3. (Internet slang) Used in self-censorship of sensitive characters.

   alt. forms: 口 (kǒu)

See also

• English: tofu
• Translingual: ⸢ ⸣, [ ]

Latin

Noun

◻ m (genitive ◻is); third declension

1. (alchemy) Abbreviation of sal (“salt”).
   • c. 1653-1656, George Starkey, translated by William R. Newman, Lawrence M. Principe, Alchemical Laboratory Notebooks and Correspondence, University of Chicago Press, published 2004, page 106:

     ac dein imposui ◻em 🜿.

     and then I added salt of tartar.

Declension

Third-declension noun.

Case	Singular	Plural
Nominative	◻	◻ēs
Genitive	◻is	◻um
Dative	◻ī	◻ibus
Accusative	◻em	◻ēs
Ablative	◻e	◻ibus
Vocative	◻	◻ēs