Definition of coaltitude in English:

coaltitude

noun

  • 1Astronomy. The complement of the altitude of a celestial object.

  • 2Aeronautics. The same altitude as that of another aircraft.

Origin

Mid 17th century; earliest use found in John Collins (1625–1683), mathematician and scientific administrator. From co- + altitude.

Pronunciation

coaltitude

/kəʊˈaltɪtʃuːd//kəʊˈaltɪtjuːd/