# expander

> English word · Noun · frequency rank #62,130

## Definitions
1. One who or that which expands.
2. A device used to widen the upper jaw so that the bottom and upper teeth will fit together better; a palatal expander.
3. A control that expands to show more options or commands, keeping them hidden until needed.
4. A kind of sparse graph with strong connectivity properties.

## Etymology
From expand + -er.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/expander