It has several meanings.
- A person who argues the case of another, such as a lawyer in a court.
- A person who speaks in support of something.
- A person who supports someone to make their voice heard, or ideally to speak up for themselves. lawyer or attorney.
The Holy Spirit: In mainstream Christianity, the Holy Spirit or Holy Ghost is one of the three persons of the Holy Trinity which make up the single substance of God; that is, the Spirit is considered to act in concert with and share an essential nature with God the Father and God the Son (Jesus Christ).
C. The Catholic Encyclopedia:
an appellation of the Holy Ghost. The Greek word which, as a designation of the Holy Ghost at least, occurs only in St. John (14:16, 26; 15:26; 16:7), has been variously translated “advocate”, “intercessor”, “teacher, “helper”, “comforter”.
According to St. John the mission of the Paraclete is to abide with the disciples after Jesus has withdrawn His visible presence from them; to inwardly bring home to them the teaching externally given by Christ and thus to stand as a witness to the doctrine and work of the Saviour.
The Holy Spirit:
…is one of the three persons of the Holy Trinity which make up the single substance of God; that is, the Spirit is considered to act in concert with and share an essential nature with God the Father and God the Son (Jesus Christ).
The Christian theology of the Holy Spirit, or pneumatology, was the last piece of Trinitarian theology to be fully explored and developed. For this reason, there is greater theological diversity among Christian understandings of the Spirit than there is among understandings of the Son (Christology) and of the Father. Within Trinitarian theology, the Holy Spirit is sometimes referred to as the “Third Person” of the Triune God – with the Father being the First Person and the Son the Second Person. Wikipedia
The Holy Spirit is frequently symbolized by a dove.