He was unable to ascertain what mechanism guided them, but they followed clearly defined paths from their nest to food and back.

All are at varying levels of maturity with clearly defined paths to achieve fielding to the Army in 2014.

Now, with only posts here and there to define paths, the garden lay sleeping under the snow.

There are defined paths when entering the area from Femes.

That is, rules or descriptions of some sort defining valid paths.

They defined paths to the target areas, and developed and expanded them.

Snow defines a clipped hedge or paths meeting on an axis.

"America and Europe no longer have clearly defined common paths."

One can also define paths and loops in pointed spaces, which are important in homotopy theory.

Tower Raiders isn't the free form type of maps, it has defined paths and select tower positions.