Descriptive:
* The turquoise lagoon within the atoll was a haven for colorful fish and playful dolphins.
* We spent our honeymoon on a secluded atoll in the South Pacific, surrounded by pristine beaches and crystal-clear water.
* The atoll was formed over centuries by the gradual accumulation of coral skeletons.
Historical:
* The ancient Polynesian people navigated the vast Pacific Ocean using the stars and their knowledge of atolls.
* The sinking of the USS Arizona during the attack on Pearl Harbor occurred near a small atoll called Ford Island.
Figurative:
* His mind was like an atoll in the vast ocean of knowledge, a small but rich island of information.
* The company's new product launch was a complete failure, leaving them stranded on an atoll of dwindling profits.