supply with information on a specific topic; "He filled me
in on the latest developments"
represent the effect of shade or shadow on Synonym(s):shade, fill in
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" Synonym(s):substitute, sub, stand in, fill in
write all the required information onto a form; "fill out this questionnaire, please!"; "make out a form" Synonym(s):complete, fill out, fill in, make out