What does Q stand for?

Smoker

Quaque (Latin: each, every; used in medical prescriptions)

Quixotic

Quibble

Quarter Note

Quay

An artificial solid construction, alongside or projecting into a harbor or basin, which acts as a landing place for cargo and passengers. It may also function as a fitting out or repair place for a ship moored alongside.

Quaker State (motor oil)

Queue

To line up tasks for a computer or device such as a printer.

Win95 fax queue

Transistor (circuit diagram marking)