He 'dedicated' [='devoted'] his life/time 'to' helping the poor. = He 'dedicated himself to' helping the poor. [=he used his time, energy, etc., to help the poor]
We have a 'dedicated' phone line for our computer. [=a phone line that we use only for our computer]
They are a group of highly 'dedicated' [='committed', 'enthusiastic'] individuals.
(..) - Fit into what? - I run this damn station, and I have the right to keep you from slandering it, I have the right to have a competent staff of dedicated men who like their work, This department will change, Mr, Massey, Really? Would you care to give me a time frame? - It will be soon, sir, (..)1994 The Glass Shield