A feeling of being uncertain or excited whilst waiting for an outcome this is usually accompanied by the feeling of anxiety.
There are many ways in which suspense can be created in terms of thrillers.
An example of this would be jaws the sound used creates tension for the audience as they are left in suspense as the build up of the sound accours the audience begin to feel the suspense.
There are many other ways to create suspense including:
Mis en Scene