specialized occupation; full-time dedication to one field
Refers to focusing exclusively on a particular profession, business, or activity, often contrasted with having a side job or multiple roles. The 'monopoly' gloss is rare and context-dependent.
彼は農業を専業としている。
He is engaged exclusively in farming.
専業主婦として家事に専念している。
She devotes herself to housework as a full-time homemaker.
He works in farming as his sole occupation.
She works exclusively as a full-time writer.
This company is moving toward specializing solely in software.