roll over (Noun) — The act of changing the institution that invests your pension plan without incurring a tax penalty.
roll over (Verb) — Make a rolling motion or turn. ex. "The dog rolled over"
roll over (Verb) — Negotiate to repay a loan at a later date for an additional fee. ex. "roll over a loan"
roll over (Verb) — Re-invest (a previous investment) into a similar fund or security. ex. "She rolled over her IRA"