1. making something unclean or contaminated with dirt, mud, or other substances
Usage: present participle of ‘dirty’

Examples

• The children were dirtying their clothes while playing in the mud.
• She avoided dirtying her white shoes by walking carefully around the puddles.
• The construction work was dirtying the air with dust and debris.
• He was dirtying his hands working in the garden all afternoon.
• The oil spill was dirtying the pristine coastline.
• Stop dirtying the kitchen counter with your muddy boots.