Answer:
In Hinduism and Jainism, "samadhi" is the meditative state in which the object and subject become one, and all distinction is lost. In Buddhism, it refers to a similar state, though the two do not necessarily become one, the mind is in a detached state in regards to the object of meditation, allowing one to make observations and observe the mental changes during this state. It is an abiding mental state in which the mind becomes highly focused, or "one-pointed".