The term 'run out of time' can be summarized by two crossword solutions: LAPSE (5 letters) and EXPIRE (6 letters). LAPSE is defined as a temporary failure to act or to maintain an attitude or state, while EXPIRE is defined as the end of a period of time or the termination of something. Both words are used to describe the concept of running out of time, which is when a certain amount of time has passed and there is no more time left.