Idk why ur asking me this, I dont have my own definition so heres a copy and paste from the wiki: On
Earth, humans didn't have chakra until
Hamura and
Hagoromo Ōtsutsuki were born with it,
[1] which was a result of their mother
Kaguya eating their planet's chakra fruit from the
God Tree. Hagoromo spread chakra to others through a practice called
ninshū, intending to create peace by using the chakra to connect people's spiritual energy so that they would understand one another without even talking. However, the people did not use chakra in the way Hagoromo hoped, instead using it to connect their inner spiritual and physical energies. They kneaded their inner chakra to amplify and weaponise it, creating what is now known as
ninjutsu.
[2]