-'s

IPA(Pronunciation)

/s/

Suffix

morpheme proscribed sometimes obsolete

(sometimes proscribed) Used to form the plurals of numerals, letters, some abbreviations and some nouns, usually because the omission of an apostrophe would make the meaning unclear or ambiguous.

Japanese Meaning

数字、文字、略語、一部の名詞の複数形を作るために用いられる接尾辞。 / アポストロフィの省略により意味が不明瞭または曖昧になる場合、その明確さを保つために使われる。

What is this buttons?

To clarify the plurals of single letters, many editors recommend using -'s, for example p's and q's.

Google Translation / DeepL Translation

単一文字の複数形を明確にするために、多くの編集者は紛らわしさを避けるためにアポストロフィ＋sの接尾辞を使うことを勧めています。例えば p の複数形は p's、q の複数形は q's のようになります。

Details

Sense（1）

(sometimes proscribed) Used to form the plurals of numerals, letters, some abbreviations and some nouns, usually because the omission of an apostrophe would make the meaning unclear or ambiguous.