subtitle

noun
1
words that translate what is said in a film into a different language and appear on the screen at the bottom. Subtitles are also used, especially on television, to help deaf people (= people who cannot hear well)
زیرنویس, زیرنویس فیلم, زیرنویس تلویزیون
compare surtitles
2
a second title of a book that appears after the main title and gives more information
عنوان فرعی, عنوان دوم, عنوان ثانوی
This book’s title is ‘Oxford Learner’s Thesaurus’. Its subtitle is ‘A dictionary of synonyms’.
verb
1
to give a subtitle or subtitles to a book, film, etc.
زیرنویس گذاشتن, زیرنویس کردن, اضافه کردن زیرنویس
compare dub