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.
(..) on your brother's lab. Pulling the plug? Yeah, it's gonna finally give us all the storage space we need. Let's get something straight here, this facility is dedicated... ...to the research of Maxwell Anderson's theories predicting the volcanic fissures... Which have never been proven. (..)2008 Journey to the Center of the Earth