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Aviation Glossary :: Key  Aviation Glossary :: Key FAA Written Test Preparation
Aviation Glossary Welcome to the Dauntless Aviation Glossary!

At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official, and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including our FAA written test prep and FAA practical test prep software and apps. If you like this glossary, you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).

To initiate an action by depressing a key or a button.
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source: FAA Aviation Maintenance Technician Airframe Handbook (FAA-H-8083-31)

As an adjective:
  1. Indispensable, supremely important.
  2. Important, salient.
As a noun:
  1. An object designed to open and close a lock. ?
  2. An object designed to fit between two other objects (such as a shaft and a wheel) in a mechanism and maintain their relative orientation.
  3. A crucial step or requirement. ?
  4. A guide explaining the symbols or terminology of a map or chart; a legend.
  5. A guide to the correct answers of a worksheet or test.
  6. (computing) One of several small, usually square buttons on a typewriter or computer keyboard, mostly corresponding to text characters.
  7. (historical) A manual electrical switching device primarily used for the transmission of Morse code.
  8. (cryptography) A piece of information (e.g. a passphrase) used to encode or decode a message or messages.
  9. (Internet) A password
As a verb:
  1. To fit (a lock) with a key.
  2. To fit (pieces of a mechanical assembly) with a key to maintain the orientation between them.
  3. To mark or indicate with a symbol indicating membership in a class. ?
  4. (telegraphy and radio telegraphy) To depress (a telegraph key).
  5. (radio) To operate (the transmitter switch of a two-way radio).
  6. (computing) (more usually to key in) To enter (information) by typing on a keyboard or keypad.
  7. To link (as one might do with a key or legend). ?
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source: Wikitionary / Wikipedia and Related Sources (Edited)

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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be. Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which you saw the original term. Please use your good judgement when using this resource.

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