foin means “hay” | MotiTan French Dictionary

More examples

On met du foin dans la mangeoire.

We put hay in the feed trough.

A loose pile of sun-dried grass stored for livestock in a barn.

paille: Dried stalks such as wheat straw, used for bedding or mats.
herbe: Common grass growing naturally in a field or garden.

Herbe ou graminée coupée puis séchée servant de fourrage pour animaux d'élevage.

French foin comes from Latin fenum through Old French fein, with historical sound changes leading to its modern form.

In ne pas en faire tout un foin, foin refers figuratively to an unnecessary fuss.