1. the process of discoloring or marking something with a stain
2. a technique used in microscopy to color specimens for better visibility
Usage: scientific

1. present participle of stain; the act of discoloring or marking with a stain

Examples

• The staining on the carpet was permanent after the wine spill.
• She was staining the wooden deck with a dark brown finish.
• The laboratory uses special staining techniques to examine bacteria.
• Coffee staining is common on white shirts.
• He’s staining the fence this weekend.
• The staining process takes several hours to complete.
• Red wine is notorious for staining fabric.