The definition of 'fill in' & the word 'fill in' in example sentences or phrases

Noun
1
someone who takes the place of another (as when things get dangerous or difficult)
Verb
1
supply with information on a specific topic
2
represent the effect of shade or shadow on
3
be a substitute
4
write all the required information onto a form

Synonyms of the word 'fill in' & Antonyms of the word 'fill in'.

Noun
Synonymsbackup, backup man, relief, reliever, stand-in, substitute,
Verb
Synonymsshade, stand in, sub, substitute, complete, fill out, make out,