fill in

definition: supply with information on a specific topic
example:
speech part: verb
synonyms:
definition: write all the required information onto a form
example:
speech part: verb
synonyms: complete
definition: represent the effect of shade or shadow on
example:
speech part: verb
synonyms: shade
definition: be a substitute
example:
speech part: verb
synonyms: substitute

How fill in is being used?