1. dark, threatening, or gloomy in appearance (of sky, weather, or expression)

1. present participle of 'lour': to look angry, sullen, or threatening; to frown

Examples

• The louring clouds suggested a storm was approaching.
• He gave her a louring look across the table.
• The sky was louring and dark as we drove through the mountains.
• She sat louring at her desk, clearly unhappy with the decision.
• A louring expression crossed his face when he heard the news.
• The louring weather kept most people indoors that afternoon.