space key

noun

1

: space bar sense 1

2

: a key on a monotype keyboard each depression of which causes the setting of a space of fixed width (such as one em)

3

: the key on a key punch that controls the spacing of holes in punched cards

The Ultimate Dicitonary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now