Salient is an interesting word since it can be used as both a noun and an adjective.
As an adjective, salient means to project outward, to leap or jump, or to be prominent or conspicuous. It can be another way of saying "striking" or "noticeable" too.
As a noun, salient is a geographical term when a landmass projects beyond its surroundings. It is also a military term, an outward projection in a battle line or a fortification, like a bastion.
In this case, I recently used salient to briefly describe a person through another's point of view; "She's become quite a salient young woman."