1. to increase the stakes or level of commitment in a situation; to make something more serious, difficult, or competitive
The company decided to up the ante by investing more money in the marketing campaign.
A empresa decidiu aumentar a aposta investindo mais dinheiro na campanha de marketing.
2. to raise the amount of money wagered in a poker game or betting situation
He upped the ante by doubling his bet.
Ele aumentou a aposta dobrando sua aposta.