1Occasional; infrequent — describes something that happens once in a while. Commonly used in the forms たまの〜 (e.g. たまの休み 'a rare day off') and たまに ('occasionally'). Usually written in kana.
たまの休みだから、ゆっくり休んでいいよ。
Since it's a rare day off, you should relax properly.
たまの贅沢に、少し高いレストランで食事をした。
As an occasional treat, we ate at a slightly pricier restaurant.
忙しい日々の中、たまに散歩するだけでも気分転換になる。
In busy days, even an occasional walk can be refreshing.