Like in English when dealing with homographs (words with same spelling but different meanings) e.g: bat - a sports instrument OR an animal.
The Korean language is full of homographs and one just has to go by context.
Some Korean homographs we have come across in the course so far:
사과 - Apology, Apple;
다리 - Bridge, Leg;
차 - Car, Tea ; 개 - Dog, General counter;
달 - Moon, Month;
일 - Work, Day, One ...