1. plural of horsefly; large biting flies that feed on the blood of horses and other mammals

Examples

• The horseflies were particularly bothersome during the hot summer afternoon.
• She swatted at the horseflies buzzing around the stable.
• The horses kept stamping their feet to ward off the persistent horseflies.
• Horseflies can deliver painful bites to both animals and humans.
• The farmer used fly spray to protect his cattle from horseflies.
• We had to move our picnic indoors because of all the horseflies.