1. a glass container or tank in which fish and other water animals are kept
2. a building containing tanks of fish and other water animals for public display

Examples

• She cleaned the aquarium every week to keep the fish healthy.
• The tropical fish swam gracefully around the aquarium.
• We visited the city aquarium to see the sharks and dolphins.
• The aquarium featured a large whale exhibit.
• He bought a small aquarium for his goldfish.
• The aquarium’s jellyfish display was mesmerizing.
• Children pressed their faces against the aquarium glass.