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.
(..) I held recountless CVR transcripts of deceased pilots and I have significant accident investigation experience. There is no question that you're a talented, dedicated, experienced professional. Every crash investigated before are not object of this investigation. Only US Airways matters today. (..)2016 Sully