Expensive
/ɪkˈspensɪv/
Definition 1 of 2
Pro Tip 1/3Perception of Quality
Expensive often implies higher quality and exclusivity, which is why people assume such items are better. 
He invested in an expensive suit for the interview to make a good impression.
Pro Tip 2/3Subjective Term
What is considered expensive varies from person to person based on their financial situation. 
A $100 meal is expensive for some, but not for others.
Pro Tip 3/3Cultural Differences
Expensive is relative; something expensive in one country might be cheap in another. 
Electronics are more expensive in Brazil than in the United States.