To cut (grass, hair, etc.); to mow, trim, shear, or reap — a transitive verb for cutting or harvesting.
庭の雑草を週末に刈るつもりだ。
I plan to mow the weeds in the garden this weekend.
農家の人々は秋に稲を刈る。
Farmers reap the rice in autumn.
美容師は彼の髪を短く刈った。
The hairdresser cut his hair short.
羊の毛を刈る作業は春に行われることが多い。
Shearing sheep is often done in the spring.