"shrinking boundaries" is a correct phrase and can be used in written English.
It means the process of reducing or limiting the borders or limits of something. Example: With the rise of technology and globalization, the business world is experiencing shrinking boundaries as companies can now easily operate and connect with markets and consumers all around the world.
Her family is an apathetic bunch, disappointed with the shrinking boundaries of their lives.
Now Obama seems at risk of running out his time in office by accepting dutifully the shrinking boundaries of his Presidency.
Measurements of dihedral angles at grain boundary thermal grooves were used to determine that the energies of the growing boundaries are, on average, lower than the energies of the shrinking boundaries.
Similarly, in the extending germ band of the Drosophila embryo, cadherins accumulate at expanding cell cell junctions, whereas they are depleted from shrinking boundaries [106,107].
Zinke completed his review this month, and on Monday submitted an interim report that recommends shrinking the boundaries of Bears Ears.
Denying climate science, attacking the Clean Power Plan, drastically shrinking the boundaries of national monuments, abandoning the Paris climate agreement, gutting clean air, clean water, and clean car standards ― these aren't policies the American public wants (which is reflected in Trump's dismal approval ratings).
Lately, many researchers have studied the shrinking sheet boundary layer flow problem due to its important applications in industries which involve packaging process, for example, shrink wrapping.
"Ronald Coase [and Oliver Williamson] had a theory about the boundaries of companies: if you have a competitive product, expand production; otherwise, shrink your boundaries.
Housden's predecessor, Sir John Elvidge, has recently been urging Scots to rethink (and shrink) the boundaries of the state.
Just last month, the Trump Administration shrunk the boundaries of two national monuments, removing protections on nearly two million acres; Ryan Zinke, the Secretary of the Interior, has recommended further reductions.
When she announced the administration's decision to retain the monument designations, Ms. Norton made clear that the new administration would be open to plans that might shrink their boundaries or allow more commercial and recreational use.
