Birthday Bash is a term used to describe a festive celebration held on or around the day of someone's birth. It usually involves decorations, food, music, and activities that are tailored to the person whose birthday it is. The term 'birthday bash' can also be used to refer to a large PARTY or gathering that is held in honor of someone's birthday. The crossword solutions for the term 'birthday bash' include the word 'PARTY', which is a five-letter word that describes a social gathering of people who have been invited by a host for the purpose of conversation, recreation, or as part of a festival or other celebration.