' (disambiguation)

The ' character is represented by 39 in ASCII and U+0027 ' APOSTROPHE in Unicode. It is used as:

Apostrophe (as straight version of the ’ character), a punctuation mark, and sometimes a diacritical mark
Single quotation mark (as straight version of the ‘ and ’ characters)

Informal use

Being supplied as standard on many keyboard layouts, it is often used in informal contexts to replace other similar looking characters that include:

Acute accent (´), a diacritic used in many modern written languages
Aleph (ʾ), is the first letter of the Semitic abjads
Apex (´), a diacritic used to indicate a long vowel in Latin
Dakuten, japanese diacritic
- U+3099 ◌゙ COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK
- U+309A ◌゚ COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
Geresh (׳), a sign in Hebrew writing
Smooth breathing or spiritus lenis (᾿), a diacritical mark used in polytonic orthography
Tonos (΄), single diacritic that indicates stress in monotonic orthography for Modern Greek

Modifier letter apostrophe (ʼ), a glyph used primarily to represent various glottal sounds.
Modifier letter left half ring (ʿ), a character used to transliterate the letter ayin, representing the sound ʕ
Modifier letter right half ring (ʾ)
Modifier letter turned comma (ʻ)

ʻOkina (ʻ), commonly representing a phonemic glottal stop in various Polynesian languages
Ejective consonant (ʼ), used in the International Phonetic Alphabet
Greek diacritics (´)(`)(῾)(᾿), marks added to letters in Greek (particularly Ancient Greek) sometimes in combination (eg. ῞ or ῏)
Saltillo (linguistics) (Ꞌ or ꞌ), a glottal stop consonant, ʔ
Stress (linguistics) (ˈ), relative emphasis or prominence given to a certain syllable in a word

Prime (symbol) (′), used to designate units and for other purposes in mathematics, the sciences, linguistics, and music
- Foot (unit), a unit of length in the imperial and US customary systems of measurement
- Minute, a unit of time
- Minute of arc, a unit of arc