Passthrough vs. Passthru — What's the Difference?

In signal processing, a passthrough is a logic gate that enables a signal to "pass through" unaltered, sometimes with little alteration. Sometimes the concept of a "passthrough" can also involve daisy chain logic.

(US) passthrough

The act or process of passing through.

As of a signal through a device or network.

As of increased costs through a business entity to its customers through increased prices.

A wall opening intended to allow something to be passed through it.

(taxation) A legal entity intended to not incur (income) taxation at the entity, but solely at the beneficiaries.