All 3 Uses

advocate
in
The Brothers Karamazov
(Edited)

There's a lot of nastiness in it, of course....Of course I can understand that it's a philosophical novel and written to advocate an idea....†
Chpt 10

advocate = recommend or publicly support
They want to put a monument to your Pushkin for writing about women's feet, while I wrote with a moral purpose, and you,' said he, 'are an advocate of serfdom.†
Chpt 11 *

advocate = a person who publicly supports
'Anyway it's better than your Pushkin's poetry,' he said, 'for I've managed to advocate enlightenment even in that.'†
Chpt 11 *

advocate = recommend or publicly support

Definitions:

(1) (advocate as in: to advocate)
to recommend or publicly support (someone or something)
(2) (advocate as in: an advocate supporting)
a person who publicly supports and works to advance a cause

or more rarely:

someone acting in the role of a defense lawyer in England's past and in some jurisdictions today
(3) (advocate as in: an advocate in court)
a lawyer or officer of the court in some jurisdictions in Europe, colonial America, and the military
(4) (devil's advocate as in: I'll play the devil's advocate)
a person who takes an unpopular position to encourage debate or test ideas
(5) (meaning too rare to warrant focus)