Source : WordNet®

fill in
     v 1: supply with information on a specific topic; "He filled me
          in on the latest developments"
     2: represent the effect of shade or shadow on [syn: {shade}]
     3: 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" [syn: {substitute}, {sub},
         {stand in}]
     4: write all the required information onto a form; "fill out
        this questionnaire, please!"; "make out a form" [syn: {complete},
         {fill out}, {make out}]