A person who supports others to make their voices heard, or ideally for them to speak up for themselves. (noun)
To argue for someone else. (verb)
To encourage support for something. (verb)
Examples of word advocate
The approach you seem to advocate is to simply bracket all questions about the referrents of mentalistic terms, and proceed according to intuitionism.
One of the great purposes of the procedure which I am about to advocate is to give support and strength to these brilliant and patriotic members and to proclaim to them that the whole nation stands behind them.
The temptation to participate in the public dialogue as an advocate is considerable.
The alternative I advocate is to have the central government stop trying to be clever and instead get out of the way, giving poor communities (and affluent communities, too) a massive dose of selfgovernment, with vastly greater responsibility for the operation of the institutions that affect their lives — including the criminal justice, educational, housing and benefit systems in their localities.
You're absolutely right -- what some posters (re, bringing goods across the border, circumventing residency and work requirements) advocate is breaking the law.