Heat Pump Defrost Question

https://edwintqgt702.timeforchangecounselling.com/comfort-experts-on-ac-repair-in-north-fort-worth-when-your-system-runs-but-does-not-cool

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