There are multiple definitions - click on the translation that matches your context.

niższy rangą

przymiotnik

full

junior

adjective

Definitions of junior

(UK also: junior barrister) a barrister who is not a Queen's Counsel

You will also be instructed as a junior assisting a Queen's Counsel in larger cases and in advisory work.

(UK also: junior barrister) a barrister who is appearing with a leader

I will lead the defence with Mr Smith as my junior.

younger or lower in rank or importance

I worked for Lee when he was a young partner in our Moscow office and I was a junior associate.