A more thorough explanation:

Definition: Abroad means outside of one's own country, especially in a foreign country.

Examples:

• She studied abroad in Spain for a semester.
• He travels abroad frequently for work.
• They decided to move abroad and start a new life in Australia.

The examples illustrate that "abroad" refers to being in a different country than one's own. Studying abroad means studying in a foreign country, traveling abroad means traveling to a foreign country, and moving abroad means moving to a foreign country to live permanently or for an extended period of time.