instrument landing system

noun

A collection of radio navigation aids (always including a localizer and glideslope, and often one to three marker beacons as well) used by pilots for approach guidance to a specific airport runway, especially when visibility is limited.

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Meanings

nouninstrument landing system (plural instrument landing systems, abbreviation ILS)

plural instrument landing systems · abbreviation ILS

  1. aeronauticsA collection of radio navigation aids (always including a localizer and glideslope, and often one to three marker beacons as well) used by pilots for approach guidance to a specific airport runway, especially when visibility is limited.
Cite this entry
APA

instrument landing system. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/instrument%20landing%20system

MLA

“instrument landing system.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/instrument%20landing%20system. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “instrument landing system,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/instrument%20landing%20system.

Source: instrument landing system on Wiktionary, CC BY-SA 4.0.