lower-case character

noun
UK /ˌləʊ.ə.keɪs ˈkær.ək.tər/
US /ˌloʊ.ɚ.keɪs ˈker.ək.tɚ/

A small letter, like a or b, not a big letter like A or B.

The password must have at least one lower-case character.


OTHER MEANINGS

2. A character in a font that is not a capital letter.

The font's lower-case characters are easier to read in long paragraphs.

3. A letter typed without pressing the shift key.

Type your username in lower-case characters.

4. A symbol in a text that belongs to the small-letter set of an alphabet.

The code checks each lower-case character before saving.