Used to describe small physical spaces that might be hard to notice at first glance. I dropped my earring in one of the interstices of the wooden floor.
Pro Tip 2/3
Figurative Use
Sometimes used metaphorically to represent a gap in abstract things, like an argument. His reasoning is solid, with barely an interstice to question.
Pro Tip 3/3
Conveys Closeness
Suggests that the overall structure or surface is mostly solid or closed, with only small gaps. The interstices in the mosaic make the overall image glitter.