1. to be defeated by a small margin or a very close score in a competition, game, or contest
Our team lost narrowly in the final match, with a score of 2-1.
Nosso time perdeu por pouco na partida final, com placar de 2-1.
2. to fail to win something by a small difference
She lost narrowly in the election, receiving 48% of the votes.
Ela perdeu por pouco na eleição, recebendo 48% dos votos.