Definition of cleg in US English:

cleg

noun

British
  • another term for horsefly
    • ‘The clegs were in good form tonight, and they were proving annoying so I sprayed on Skin So Soft.’
    • ‘He reminded his frantically puffing audience that smoking was a well-known antidote to the predations of the great horse fly, or cleg.’
    • ‘It is, of course, the midges and the clegs who present the major problem to the Scottish naturist.’
    • ‘On Sunday I was bitten three times by clegs.’
    • ‘Usually they are called clegs, horse-flies or gad-flies, without referring to one specific species.’
    • ‘The heat was great, and the clegs and other flying torments were having a grand time at our expense.’
    • ‘But most of the walk was a weary exercise in plodding along the old military road, warily eyeing up the murky clouds while midges attacked me and clegs took chunks out of my legs.’

Origin

Late Middle English: from Old Norse kleggi.

Pronunciation

cleg

/klɛɡ//kleɡ/