skywriting
美 [s'kaɪraɪtɪŋ] 
英 [s'kaɪraɪtɪŋ] 
- na.(飞机放烟飞成的)天空文字;空中广告
 - 网络空中文字;在空中写字;挥毫云霄间
 
n.  | 1. the use of an aircraft releasing colored smoke to form letters in the sky 2. letters or a message formed in the sky by colored smoke released from an aircraft  |