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.
(..) Come on! I take your f$cking buIIet! Come on! I take your f$cking buIIet! You think you kiII me with buIIets? I take your f$cking buIIets! Go ahead! This fiIm is dedicated to HOWARD HAWKS and BEN HECHT (..)1983 Scarface