IPA: /ˈhaɪfər/
KK: /ˈhaɪfər/
A young female cow that has not yet had a calf.
The farmer bought a heifer to add to his herd.
Heifer originates from Old English 'hæfer', meaning a young female cow. The term specifically refers to a young cow that has not yet borne a calf.
Think of a young female cow when you hear 'heifer', as it directly refers to a young cow that hasn't had a calf yet.