What does blight mean?
Blight is a word with both a precise scientific meaning and a broad figurative one. In its original sense, it denotes any of various plant diseases — often caused by fungi such as Phytophthora infestans — that cause rapid browning, withering, and death of leaves, stems, or fruit, as in potato blight or chestnut blight. Because such diseases can sweep through crops quickly, blight came to stand for sudden, sweeping destruction. From there it developed a wider, metaphorical use: anything that blights damages or stunts what it touches, so writers speak of urban blight, economic blight, or a blight on someone's reputation. The word functions as both noun and verb, and its connotations are strongly negative — decay, ruin, and wasted potential. It is especially useful in journalism and social criticism for conveying how neglect or disease can spread through a community just as fungus spreads through a field.
A plant disease marked by rapid withering and death of tissue; also, any pernicious or spoiling influence.
"Farmers feared the blight would reach their fields before harvest."
In agricultural contexts, blight usually names specific fungal or bacterial diseases; figuratively, it takes modifiers like 'urban' or 'economic'.
To afflict, spoil, or destroy as if by disease; to impair growth or wellbeing.
"Years of conflict blighted the region's prospects."
Rarely used in the plural; blight is typically treated as a single phenomenon or condition rather than counted individually.
"The report catalogued several blights afflicting the city's housing stock."
The word blight may trace back to Old English 'blǣce' — and when it struck Ireland's potato crop in 1845, it changed the course of history.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of blight
Blight is first recorded in English in the early 17th century, though its exact origin is uncertain. It is generally linked to Old English 'blǣce' or related Germanic words meaning burning or scorching, reflecting the way diseased plants appear scorched or blasted. Some sources connect it further to terms for extreme heat or fever, but the precise chain of development remains debated by etymologists. No widely recognized cognates in other languages are firmly established.
Related word forms
How blight is actually used
The agricultural sense is concrete and scientific; the figurative sense is common in social commentary and journalism, often applied to urban decay, corruption, or economic stagnation. Both registers are standard.
Easily confused with blight
Blast refers to an explosion or a sudden destructive force, while blight is a plant disease or a lingering spoiling influence.