meditate
/ˈmedɪteɪt/ verb [I]
RELAX › to think calm thoughts for a long period in order to relax or as a religious activity: I meditate twice a day.
THINK formal › to think seriously about something: He meditated on the consequences of his decision.
meditation
/ˌmedɪˈteɪʃən/ noun [U] › Let's spend a few moments in quiet meditation.