Definition - What does Trinity mean?
A trinity is a group of three related deities, concepts or people. The divine trinity in Hinduism is referred to as Trimurti in Sanskrit. According to some yogis, the Trinity combines and activates when the Divine manifests creation and is thought to resolve into the Ultimate Consciousness when creation ends. It is widely accepted within Hinduism that the three forms of the Hindu Trinity actually represent earth, water and fire.
Yogapedia explains Trinity
Within the Christian Trinity, Christian belief holds that there is one God who is three persons. Within this belief, the Father produces or creates, the Son (Jesus Christ) is created and can empathize with man, and the Holy Spirit advances or does the work of the Father in the world.
The Hindu Trinity refers to the three main Hindu gods: Brahma, Vishnu and Shiva. Brahma is the creator god (represented by earth), Vishnu is the perserver god (represented by water) and Shiva is the destroyer/transformer god (represented by fire). These three forms together represent the highest Hindu deity, the Supreme Divine.