complete2 S2 W1 [transitive]
to finish doing or making something, especially when it has taken a long time:
Students must complete the course.
The building took two years to complete.
to make something whole or perfect by adding what is missing:
The child's task was to complete the sentences.
I need one more stamp to complete the set.
to write the information that is needed on a form [= fill out]:
In all, more than 650 people completed the questionnaire.
Send your completed form to the following address.