astronautics astronautical • astronavigation · · · Info · Definitions · Synonyms · Characters · · astronautics · · Text Latin · · Script 12 · · Length 5 · · Syllables Definitions · · · (noun) the theory and practice of navigation through air or space. Synonyms: aeronautics. · · Noun Definition 1 Synonyms · · · aeronautics · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075