English Reference
noun

strata

n.
US /ˈstɹætə/ UK /stɹˈɑːtɐ/ stra·ta UK spelling stratas

  1. 01 C1 Advanced AcademicTechnical Science

    the plural form of 'stratum', meaning several layers of rock, soil, or levels in a social group.

    the plural form of stratum; refers to horizontal layers of sedimentary rock or distinct social classes within a population.

    Simple

    Scientists studied the different strata of rock to understand the earth's history.

    In context

    The archaeological excavation revealed distinct cultural strata, each providing evidence of the various civilizations that had occupied the site over two millennia.

    Usage

    While 'strata' is technically plural, it is occasionally used as a singular collective noun in non-standard speech.

  2. 02 B2 Upper Intermediate American English Cooking

    a North American dish made of layers of bread, eggs, and cheese, usually baked in the oven.

    a layered casserole in American cuisine, typically consisting of bread, eggs, and cheese, often prepared ahead of time to allow the bread to soak.

    Simple

    We prepared a vegetable strata on Saturday night to bake for Sunday breakfast.

    In context

    The brunch menu featured a savory spinach and feta strata, which had been chilled overnight to ensure the custard was fully absorbed by the sourdough layers.

    casserolebread pudding
  3. 03 C1 Advanced Dialect Law

    a type of property ownership where you own your unit but share the building and land with others.

    a form of property title and ownership involving individual units within a multi-unit complex, with shared ownership of common areas.

    Simple

    They decided to buy a strata in the city center to be closer to work.

    In context

    The strata council met to discuss the rising costs of maintaining the building's exterior and shared garden spaces.

    Teacher's tip

    This sense is specific to certain dialects, most notably in Western Canada (British Columbia) and Australia.

Fossil plants in the Marshybank strata include gymnosperms (for example, conifers, cycads and ginkgos), ferns and horsetails.

Phys.org· 26 Aug 2026

During the 1990s, a new strata of independent film studios and distributors revitalised the Hollywood movie machine.

The Guardian· 19 Aug 2026

Etymology 1

From strata title.

Etymology 2

The bread is layered with the filling to produce strata (layers).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated