Heat Pump Defrost Question

https://griffinbmiu621.summitquill.com/posts/booking-ac-repair-in-north-fort-worth-with-comfort-experts-step-by-step

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