fill in

verb

1. 1

   supply with information on a specific topic

   He filled me in on the latest developments

2. 2

   write all the required information onto a form

   fill out this questionnaire, please!

   make out a form

3. 3

   represent the effect of shade or shadow on

4. 4

   be a substitute

   The young teacher had to substitute for the sick colleague

   The skim milk substitutes for cream--we are on a strict diet