To subsume means to include something within a larger group or category.
Subsume is a big word that means to put something inside something else, like putting toys inside a box.
Examples:
All the different kinds of dogs are subsumed under the category of 'animal'.
The idea of 'fruit' subsumes apples, oranges, and bananas.
The word 'vehicle' subsumes cars, trucks, and bikes.
The category of 'toys' subsumes dolls, cars, and blocks.
The concept of 'music' subsumes rock, pop, and classical.
The idea of 'food' subsumes pizza, salad, and ice cream.