What does "passthrough" mean?

The act or process of passing through.; As of a signal through a device or network.

What is a synonym for "passthrough"?

Common synonyms include: flowthrough.

noun

noun ·Rare ·Advanced level

Noun

1
The act or process of passing through.; As of a signal through a device or network. countable, uncountable
2
The act or process of passing through.; As of increased costs through a business entity to its customers through increased prices. countable, uncountable
"The airlines called the fuel surcharge a passthrough, but did not rescind it until well after fuel prices had returned to previous levels."
3
The act or process of passing through.; Allowing the use of some resource unchanged from one system to another. countable, uncountable
"GPU passthrough"
4
A wall opening intended to allow something to be passed through it. countable, uncountable
5
A legal entity intended to not incur (income) taxation at the entity, but solely at the beneficiaries. countable, uncountable
"Partnerships, limited-liability companies, and Subchapter S corporations are the main US passthroughs."

"The airlines called the fuel surcharge a passthrough, but did not rescind it until well after fuel prices had returned to previous levels."

Deverbal from pass through.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.