The term 'slip by' can be defined as passing or elapsing without being noticed, and can also mean to EVADE or ELUDE something. This term can be represented by five different crossword solutions: LAPSE (5 letters), PASS (4 letters), ELAPSE (6 letters), ELUDE (5 letters), and GLIDE (5 letters). LAPSE means to PASS slowly or to become invalid, PASS means to move past something, ELAPSE means to PASS away or to go by, ELUDE means to avoid or escape, and GLIDE means to move smoothly and effortlessly.