air castle air casing • air cataract · · · Info · Definitions · Synonyms · Characters · · air castle · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) absentminded dreaming while awake. Synonyms: reverie, revery, daydream, daydreaming, oneirism, air castle, castle in the air, castle in Spain. · · Noun Definition 1 Synonyms · · · reverie · · Synonym 1 revery · · Synonym 2 daydream · · Synonym 3 daydreaming · · Synonym 4 oneirism · · Synonym 5 castle in the air · · Synonym 6 castle in spain · · Synonym 7 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074