1. A recurring or established subject, motif, or idea that remains constant throughout a work, discussion, or period
The fixed theme of redemption runs throughout the novel.
O tema fixo da redenção percorre todo o romance.
2. In music, a principal melodic subject that returns unchanged or with minor variations
The composer developed variations on the fixed theme from the opening.
O compositor desenvolveu variações sobre o tema fixo da abertura.
3. A predetermined or established central idea in academic work, research, or creative projects
The conference's fixed theme for this year is climate sustainability.
O tema fixo da conferência este ano é sustentabilidade climática.