We found 4 dictionaries that define the word GCAS:

General (2 matching dictionaries)

1. GCAS: Dictionary.com
2. GCAS: Wiktionary

Miscellaneous (2 matching dictionaries)

3. GCAS: Acronym Finder
4. AbbreviationZ (No longer online)

(Note: See gca as well.)

Definitions from Wiktionary (GCAS) ▸ noun:  (aviation) Acronym of ground collision avoidance system. ▸ Words similar to GCAS ▸ Usage examples for GCAS ▸ Idioms related to GCAS ▸ Wikipedia articles (New!) ▸ Popular adjectives describing GCAS ▸ Words that often appear near GCAS ▸ Rhymes of GCAS ▸ Invented words related to GCAS