In Jain Dharma, cakra usually means the Cakra-ratna — the divine discus weapon of a Cakravarti (universal emperor).

Meaning

• It is a supernatural, shining weapon.
• It appears as a divine discus/spinning wheel.
• It is one of the ratnas (precious divine possessions) of a Cakravarti.
• It symbolizes power, victory, and sovereignty.

In Jain understanding

• The Cakra-ratna is not used for cruelty in the ideal spiritual sense.
• It belongs to a king with immense karmic merit and worldly power.
• In Jain tradition, it represents worldly authority, not liberation.
• True spiritual victory in Jainism is through ahimsa, tapas, and self-control, not weapons.

Important point

The word cakra can also mean a wheel/discus, but in Jain texts, when mentioned as a divine weapon, it most often refers to the Cakra-ratna of a Cakravarti.

If you want, I can also explain the 14 ratnas of a Cakravarti in Jainism.