How fast you are losing cash each month, usually quoted as gross burn (every dollar out) or net burn (out minus revenue in).
WeWork's pulled 2019 S-1 disclosed losses of $1.9B on $1.8B of revenue in 2018, translating to roughly $700M of quarterly net burn. The number forced a SoftBank rescue at an $8B valuation, down from $47B months earlier, and remains the textbook case of a burn rate that outran any plausible runway plan.