1. A company or enterprise experiencing a reduction in sales, profits, market share, or overall performance over time
The retail business in decline had to close several stores.
O negócio em declínio no varejo teve que fechar várias lojas.
2. An economic activity or commercial venture that is losing relevance, customers, or viability in the marketplace
The newspaper business in decline shifted focus to digital platforms.
O negócio de jornais em declínio mudou seu foco para plataformas digitais.