meditate // meditates, meditating, meditated
 
1 To meditate on something means to think about it carefully and deeply for a long time.      VB
He was left alone to meditate on his sins.
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...the subject of my meditation.
I hope we will not disturb your meditations. 
 
2 If you meditate, you remain in a calm, silent state for a period of time, often as part of a   VB religious training or practice.
...meditating in the wilderness for seven days. 
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He was deeply interested in meditation and yoga.