Khamr (خمر) means any intoxicating drink. The Qur'an forbids it (5:90), and the Prophet ﷺ said that whatever intoxicates in large amounts is forbidden in small amounts.
Scholars differ on tiny amounts of alcohol used as a carrier in flavourings, or naturally present in foods like bread and fruit juice, which do not intoxicate. See Is food with a little alcohol halal?