1. 副标题;小标题
The subtitle of a piece of writing is a second title which is often longer and explains more than the main title.

2. (外国电影的)字幕，对白译文
Subtitles are a printed translation of the words of a foreign film that are shown at the bottom of the picture.

1. secondary or explanatory title

2. translation of foreign dialogue of a movie or TV program
usually displayed at the bottom of the screen

Synonym: caption