0 small spaces in something or parts of something that are difficult to reach: --
A team of experts will be scouring the nooks and crannies of the international banking system to shut down his vast resources.
There's lots of great information hidden in the nooks and crannies of our site.
A toothbrush can firmly clean nooks and crannies that sponges and rags can't reach.
These fish like to hang out under coral heads, ledges, or in other nooks and crannies.