black spot

noun

1

: any of several bacterial or fungal diseases of plants characterized by black spots or blotches especially on the leaves

2

chiefly British : a dangerous or troublesome place or area

… Wisteria Lane has always been a major accident black spot.

—Jane Simon

Examples of black spot in a Sentence

Recent Examples on the Web

Fight Fungi Common fungal problems like powdery mildew on a variety of plants and black spot on roses can be curbed with apple cider vinegar. —Miranda Crowell, Better Homes & Gardens, 15 June 2026

Signs of cauliflower spoilage include widespread dark brown or black spots, off-smells, mushy or slimy texture, and yellowing. —Alana Al-Hatlani, Southern Living, 11 June 2026

Expect severe congestion near major cities, coastal resorts and famous viewing locations, with areas around Madrid, Barcelona, Tarragona, Zaragoza and Valencia all potential black spots. —Jamie Carter, Space.com, 3 June 2026

This includes powdery mildew, white and gray molds like botrytis, slime mold, and black spot, Bradley says. —Michelle Mastro, The Spruce, 23 May 2026

Word History

First Known Use

1832, in the meaning defined at sense 2

Rhymes for black spot

• allot
• barat
• begot
• besought
• bethought
• bloodshot
• boycott
• buckshot
• crackpot
• croat
• culottes
• dashpot

Medical Definition

black spot

noun

: a spotting of frozen meat caused by an imperfect fungus of the genus Cladosporium (C. herbarum)