| armpit |
the hollow formed beneath the arm at the shoulder. |
| bamboo |
a tropical grass plant that has hard, woody, hollow stalks. Bamboo stalks grow straight and tall, and very quickly. Many kinds of bamboo grow as high as a tree. [1/2 definitions] |
| baton |
a rod or staff of hollow metal that is carried or spun by a drum major or majorette. [2/3 definitions] |
| bell |
a hollow metal cup that makes a ringing sound when struck. [1/2 definitions] |
| boom1 |
to make a deep, hollow noise. [2/4 definitions] |
| brim |
the top edge of a hollow object such as a cup; rim. [1/3 definitions] |
| cave |
a natural hole or hollow in the earth. Many caves have openings in a hillside or cliff. |
| cavern |
A cavern is a very large cave. A cave is a natural hollow place in the earth. A cave can be big enough for a person or animal to go inside, but sometimes it is very small. A cavern is big enough for people to walk around in. |
| cavity |
a hollow place or hole. |
| cell |
any small, hollow space within a larger group of hollow spaces. [1/4 definitions] |
| chime |
(usually plural) a set of tuned bells or other hollow objects that produce musical sounds when struck. [1/3 definitions] |
| chimney |
a hollow, upright structure above a fireplace or furnace that carries smoke upward and to the outside. |
| clop |
a sharp, hollow sound. [1/2 definitions] |
| crater |
a hollow area shaped like the inside of a bowl. The mouth of a volcano is a crater, and the moon has many craters on its surface. |
| dent1 |
a small hollow made in a surface by or as if by pressure or a blow. [1/2 definitions] |
| depression |
a low spot or hollow. [1/4 definitions] |
| dimple |
a small natural dent or hollow that forms in the cheeks during a smile. [2/3 definitions] |
| drum |
a percussion instrument shaped like a cylinder. A drum has a hollow body covered at one or both ends by a tight material. It is played by beating with sticks or the hands. [1/5 definitions] |
| excavate |
to make a hole or hollow place in by digging. [1/2 definitions] |
| fang |
a long, pointed tooth. Some animals use their fangs to hold and tear prey. Some snakes have hollow fangs through which they inject poison. |
| flue |
a hollow pipe inside a chimney that lets hot or cold air, smoke, or steam escape to the outside. |