1. Support that is half-hearted, lacking enthusiasm, or not fully committed; neither strongly supportive nor openly opposed.
The proposal received only lukewarm support from the board members.
A proposta recebeu apenas apoio morno dos membros do conselho.
2. A response or backing that shows indifference or mild acceptance rather than genuine enthusiasm.
His idea got lukewarm support from critics who found it interesting but flawed.
Sua ideia recebeu apoio morno de críticos que a acharam interessante mas falha.