headbox

noun

1

: a receptacle in a papermaking machine that holds the stuff and regulates its flow onto the wire

2

: a case covering the operating mechanism of a venetian blind

The Ultimate Dictionary 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