Published in 1997 by Henry Holt, it explores the fluid boundaries of race in the Caribbean.

The naming difficulties reflect the fluid boundaries of the genre, as well as embarrassment caused by the pornographic nature of some of these games.

For Mr. Kon the fluid boundaries between dimensions simply reflect the world as we experience it.

Sound may be absorbed by losses at the fluid boundaries.

"Society has such fluid boundaries these days, it can be hard to differentiate between friendships and affairs," she warns.

Anthropologists have named various cultural regions, with fluid boundaries, that are generally agreed upon with some variation.

It was a tight scene, one big family, fluid boundaries.

Vivid, focused and engaging, he asked us to remember the fluid boundaries of all the component countries that, over time, went to make up what we know now as Germany.

He concluded that tribes in general are characterized by fluid boundaries and heterogeneity, are not parochial, and are dynamic.

"For young people, there is rather a kind of fluid boundary between the real and virtual world, and they can easily pass through it," she said.