| aboard |
When you get aboard an airplane, boat, or train, it means that you get onto it to travel somewhere. [1/2 definitions] |
| about |
If a book is about trains, it means that the book tells you many things on the subject of trains. It might tell you things like where the first trains were built, what fuel trains use, or how fast trains travel. [1/9 definitions] |
| abroad |
If you live abroad, it means that you live in a country that is not yours. If you travel abroad, it means that you travel outside of your own country. [1/2 definitions] |
| air force |
An air force is a group of people who fight like an army but fight in the air instead of on land. An air force uses airplanes and other machines that travel through the air. |
| airsick |
feeling sick or dizzy because of air travel; feeling ill due to flying. |
| amphibian |
a vehicle that can travel or operate on both land and water. Some tanks, boats, and airplanes are amphibians. [1/2 definitions] |
| amphibious |
able to travel or operate on both land and water. [1/2 definitions] |
| asteroid |
Asteroids are chunks of rock that travel around the sun in the same way as planets travel around the sun. Asteroids can be as big as 600 miles across or as small as a single piece of dust. Most asteroids are found between the orbits of the planets Jupiter and Mars. |
| Atlantic Ocean |
The Atlantic Ocean is one of the five oceans on our planet. An ocean is a large body of salt water that covers a very large part of the earth. It is much bigger than a sea or lake. If you want to travel from America to Africa or Europe, you have to cross the Atlantic Ocean. |
| back road |
a road that avoids traffic and high speed travel. It is often a small, country road that goes through areas with few houses and buildings. |
| baggage |
suitcases, bags, or trunks used to carry things during travel; luggage. |
| balloon |
A balloon is a very large bag that is made to go high up into the air when it is filled with a certain kind of gas or with hot air. This kind of balloon can be attached to something that carries passengers or scientific equipment. Balloons like this can travel long distances. [1/2 definitions] |
| boat |
a small, open vehicle for traveling on water. [2/3 definitions] |
| bridge1 |
a structure built over a river, railroad, or other obstacle, that allows people to travel across. [1/4 definitions] |
| briefcase |
A briefcase is a flat container that is often made of leather and has a handle. Briefcases are used for carrying things like papers or books. Adults often use them when they travel between home and work. |
| bus1 |
a long motor vehicle with many rows of seats used to carry large numbers of people. Buses usually travel along a regular route. [1/3 definitions] |
| by |
We sometimes use the word "by" to talk about how we do something or what we use to do something. When you travel by car, it means that you use a car to go somewhere. [1/9 definitions] |
| camp1 |
When you camp, you sleep at night in an outdoor place, often in a tent. When people travel or take a vacation, they sometimes camp instead of staying in a hotel. People often camp in places like woods, forests, and other natural places. [1/3 definitions] |
| canal |
A canal is something like a river, but it is made by people. Boats can travel up and down canals. Canals are typically created in order to link one body of water with another. |
| carriage |
A carriage is something set on wheels that people can sit inside and use to travel from place to place. A carriage has no engine, and it has to be pulled or pushed to make it move. Before people used cars, they often rode in carriages pulled by horses. |
| come |
to move or travel toward the speaker; approach. [1/4 definitions] |