Definitions

1. noun

a long narrow groove or trench, especially one made in the ground or on the surface of something by a plough or other implement

“The farmer ploughed a deep furrow across the field.”

2. verb

to make or create a furrow in something

“The machine will furrow the soil for planting.”

3. verb

to cause or express concern or anxiety

“Her worries began to furrow her brow.”