Heat Pump Defrost Question

https://shaneimdf023.swiftnestly.com/posts/fall-ac-care-in-north-fort-worth-from-the-comfort-experts-team-to-prevent-spring-ac-repair

Heat Pump Defrost Question Is it normal for a heat pump to blow steam from the outdoor unit in winter? Ours did that during the freeze last February and I panicked a bit. Sounds like it might just be the defrost cycle from what I'm reading here