aum aadideavaaya namah (ओं आदिदेवाय नमः) (ఓం ఆదిదేవాయ నమః)
devah = one who plays and entertains.
He is called aadidevah as He caused the creation of the universe, and it was a child's play for Him.
In essence, the whole universe is meant for His play and entertainment.
aum namo bhagavate vasudevaya!
PS: For the meanings of the other namams published earlier on this blog, please find them at the link given below:
