Senses
天马行空/ 天馬行空 bold and imaginative
(idiom) like a heavenly steed soaring across the skies; describes a style of writing, calligraphy, or thought that is powerful, fluent, and unrestrained by convention
天马行空/ 天馬行空 unrealistic
(idiom) describes ideas or speech that are flighty, impractical, or totally detached from reality
天马行空/ 天馬行空 advancing rapidly
(idiom) describing progress or momentum that is swift and powerful, like a heavenly steed galloping ahead