do concurso

of the contest

→ do
phrase Rare #39,966
of the contest Contraction of de + o. Used to show possession or relation: “the contest’s...”.
PO: As regras do concurso estão no site.
EN: The contest rules are on the website.

Ele quer participar do concurso.

He wants to participate in the contest.

O resultado estará no site do concurso na quarta-feira.

The results will be available on the contest website on Wednesday.

Muitos estudantes participaram do concurso.

Many students participated in the contest.

Eu participei do concurso.

I participated in the contest.