Become Void is a term used to describe when something is no longer valid or legally binding. The two crossword solutions for this term are LAPSE and EXPIRE. LAPSE is a five letter word that means to pass gradually or to come to an end. EXPIRE is a six letter word that means to come to an end or to become invalid. Both words can be used to describe the term Become Void, which is when something is no longer valid or legally binding.