a.

1. 職業（上）的；從事特定專業的[Z][B]
2. 職業性的，非業餘性的[Z][B]
3. 很內行的；極稱職的；高水準的
   a highly professional administrator

   一位非常內行的管理人員

4. 【貶】以……為業的，擅長……的
   He is a professional complainer.

   他是一個發牢騷專家。

n.[C]

1. 職業選手
2. 專家，內行

adj.

1. relating to or belonging to a profession.
   ▸worthy of a professional person; skilful or competent.
2. engaged in an activity as a paid occupation rather than as an amateur.
3. informal, derogatory habitually engaged in a particular activity:
   a professional time-waster.

n.

[名]

1. 專業人士。