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.
(..) The innocent man I thought he was. In fact, it is now clear to me That he was a vital and dedicated member Of the terror cell that planned and plotted This attack for years. Anchor: Excuse me for interrupting, ms. Sutton, (..)2015 TvShow: Homeland Title: A False Glimmer Season: 5 Episode 12