1. A limited or restricted area of study, work, or activity
He specialized in a very narrow field of physics.
Ele se especializou em um campo estreito da física.
2. A geographic area that is physically narrow or constricted
The narrow field between the two mountains was difficult to traverse.
O campo estreito entre as duas montanhas era difícil de atravessar.
3. Limited scope or range of possibilities
The company operates within a narrow field of expertise.
A empresa opera dentro de um campo estreito de especialização.