(1) Age.
(2) State of being or mind. There are three states of being - waking, dreaming, and sound sleep.

Mind can be compared to water. Water exists in four states - causal state, in the form of
hydrogen and oxygen; in subtle state, in the form of water; in gross state, in the form of ice: and in gaseous state, in the form of vaporized steam. Even so the mind is in a gross state during Jagrit state when it enjoys sensual objects; is in a subtle state when it functions in the dream state; is in a causal state when it gets involved into its cause, Mool-A-Vidyaa, during deep sleep and it evaporates as gas when it melts or dissolves in Brahman during Nirvikalp Samaadhi.

Just as the physical body is composed of solid, liquid and gaseous matter, so also the mind is made up of subtle matter of various grades of density with different rates of vibration.