Main entry: fill in
Definition: supply with information on a specific topic
Usage: He filled me in on the latest developments
Main entry: make out, complete, fill in, fill out
Definition: write all the required information onto a form
Usage: fill out this questionnaire, please!; make out a form
Definition: represent the effect of shade or shadow on
Main entry: substitute, sub, fill in, stand in
Definition: be a substitute
Usage: The young teacher had to substitute for the sick colleague; The skim milk substitutes for cream--we are on a strict diet