From Longman Dictionary of Contemporary Englishfoalfoal1 /fəʊl $ foʊl/ noun [countable] 
HBAa young horse → colt, filly
HBAa young horse → colt, fillyExamples from the Corpus
foal• Sometimes when groups of horses get mixed up a foal may seem to get irrationally fixated on another horse.• Unfortunately a New Forest stallion got into the field and Shamrock got in foal.• They can be naturally very high in Iodine and can cause problems, particularly in foals.• Do not let foals get cold or wet out in the field.• Some foals can suffer from so-called neonatal maladjustment syndrome.• Some foals develop a milk diarrhoea when the mare shows a foal heat usually six to eight days after foaling.• This is usually transient and the foal does not stop sucking or look ill.• Do the foals stay with the mares or are they kept separately?foalfoal2 verb [intransitive] HBAto give birth to a foal→ See Verb tableOrigin foal1 Old English fola 