This is a more complex concept than the traditional feeling of one being there.

He had thrown a complex concept at the child.

The term nation is a complex concept that has a variety of definitions.

They are aimed at professional audiences and often discuss complex concepts.

The validity of a test is an even more complex concept.

Racial and ethnic identity are complex concepts in this region.

Technology allows children to experience these complex concepts in a more visual manner.

Like all complex scientific concepts, I find it hard to grasp for more than three minutes at a time.

They must communicate complex concepts to clients who may not share their language or depth of knowledge.

It had amazed me, the case with which she touched on these complex concepts.