"Housing instability" means that a person or family does not have a stable or secure place to live. They may experience frequent moves, live in overcrowded conditions, or face the possibility of losing their housing. Full definition
The result is poorer health, as well as a higher likelihood of being hospitalized or experiencing housing instability. (sciencedaily.com)
At the same time, I found out through spending time with students that there is a huge overlap of housing instability for students transitioning in and out of the foster community. (gse.harvard.edu)