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Definition of blackfly

blackfly

/ˈblæk.flaɪ/
black · fly
Plural:blackflies
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blackfly Lexical Profile

blackfly Game Scores & Validity

• noun

1

A small, dark, humpbacked two-winged fly of the family Simuliidae that breeds near running water, the females of which inflict painful bites on humans and livestock and can transmit river blindness in tropical regions.

Example

"Hikers in the northern woods wore protective head nets to keep the swarming blackflies at bay during late spring."

2

British A small, dark-bodied aphid (Aphis fabae) that infests broad beans, sugar beets, and other garden and agricultural crops by feeding on plant sap.

Example

"The gardener sprayed the broad bean plants with soapy water to control a heavy infestation of blackfly."

Synonyms
View all synonyms for blackfly

• Nearby Words

blacken
blackened
blackface
blackfly
blackhead
blackhearted
blacking

Cite this Entry

Wordmom. (2026). Definition of Blackfly. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/blackfly
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