cap·tion

noun

/ˈkæpʃn/

words that are printed below a picture, cartoon, etc. that explain or describe it（图片、漫画等的）说明文字 see also closed-captionedTopics Literature and writingb2
Oxford Collocations Dictionary
Caption is used after these nouns:
photo
Word Originlate Middle English (in the sense ‘seizing, capture’): from Latin captio(n-), from capere ‘take, seize’. Early senses ‘arrest’ and ‘warrant for arrest’ gave rise to ‘statement of where, when, and by whose authority a warrant was issued’ (late 17th cent.): this was usually attached to a legal document, hence the sense ‘heading or accompanying wording’ (late 18th cent.).

verb

/ˈkæpʃn/

[usually passive]

Verb Forms

present simple I / you / we / they caption	/ˈkæpʃn/ /ˈkæpʃn/
he / she / it captions	/ˈkæpʃnz/ /ˈkæpʃnz/
past simple captioned	/ˈkæpʃnd/ /ˈkæpʃnd/
past participle captioned	/ˈkæpʃnd/ /ˈkæpʃnd/
-ing form captioning	/ˈkæpʃənɪŋ/ /ˈkæpʃənɪŋ/

caption something to write a caption for a picture, photograph, etc.给（图片、照片等）加说明文字
- The cartoon was captioned ‘The English abroad’.漫画的标题是“海外的英国人”。
Word Originlate Middle English (in the sense ‘seizing, capture’): from Latin captio(n-), from capere ‘take, seize’. Early senses ‘arrest’ and ‘warrant for arrest’ gave rise to ‘statement of where, when, and by whose authority a warrant was issued’ (late 17th cent.): this was usually attached to a legal document, hence the sense ‘heading or accompanying wording’ (late 18th cent.).