masterly

UK: /ˈmɑːstə^rli/ US: /ˈmæstɚli/ ,(mas′tər lē, mä′stər-)

WordReference Random House Learner's Dictionary of American English © 2025

mas•ter•ly /ˈmæstɚli/   adj. 

1. very skillful:
   a masterly job of fixing the wiring.

adv. 

2. in a masterly manner.

WordReference Random House Unabridged Dictionary of American English © 2025

mas•ter•ly  (mas′tər lē, mä′stər-), adj. 

1. like or befitting a master, as in skill or art;
   worthy of a master;
   very skillful:
   a masterly presentation of the budget.

adv. 

2. in a masterly manner.

• late Middle English maisterly. See master, -ly 1375–1425

mas′ter•li•ness, n. 
Usage

See masterful. 

Collins Concise English Dictionary © HarperCollins Publishers::

masterly / ˈmɑːstəlɪ/ adjective

1. of the skill befitting a master

ˈmasterliness noun