1. in a way that is extremely luxurious, generous, or expensive
They decorated the ballroom lavishly for the wedding.
Eles decoraram o salão de baile luxuosamente para o casamento.
2. in a way that is extravagant or wasteful with money or resources
He spent lavishly on his vacation without worrying about the cost.
Ele gastou generosamente em suas férias sem se preocupar com o custo.