1. to conclude or finish something in a feeble, unconvincing, or ineffectual manner
The movie ended weakly with an unsatisfying conclusion.
O filme terminou fracamente com um desfecho insatisfatório.
2. to finish with insufficient strength, conviction, or impact
His speech ended weakly, losing the audience's attention.
Seu discurso terminou fracamente, perdendo a atenção da audiência.