The phrase "dwindling supply" means that the amount of something is gradually getting smaller or decreasing over time.
Sentences with «dwindling supply»
The housing recovery is being driven by dwindling supplies of homes on the market, especially distressed properties that tend to sell well below their cost of construction. (articles.chicagotribune.com)
The decision is not based on worries over dwindling supplies. (newscientist.com)
When growing demands on water meet dwindling supplies, what will it mean for our electric system? (synapse-energy.com)