1.become more extreme;
The tension heightened
2.make more extreme; raise in quantity, degree, or intensity;
heightened interest
3.increase;
This will enhance your enjoyment
4.increase the height of;
The athletes kept jumping over the steadily heightened bars
5.make (one's senses) more acute;
This drug will sharpen your vision
6.make more intense, stronger, or more marked;
The efforts were intensified, Her rudeness intensified his dislike for her