adjective
contiguous
kun-TIG-yoo-us/kənˈtɪɡjuəs/
Touching or joined without a gap.
The two farms occupy contiguous plots along the river.

Etymology
‘Together’ and ‘touch’ give the image of things meeting at a surface or border. Contiguous areas preserve that physical relationship: their edges meet, making them directly adjoining.
In context
these possible giga cities would be the result of the cities in a megalopolis merging into one contiguous urban area a megalopolis is a cluster of nearby metropolitan areas
More examples
- The hotel gives us contiguous rooms with a connecting door.
- Alaska is not one of the 48 contiguous states.
- The park protects a contiguous stretch of forest.
Forms
contiguous
contiguity noun — The state of touching without a gap.
contiguously adverb — In direct contact, without a gap.
Similar words
- adjoining
- Adjoining emphasizes a shared border between rooms or properties.
- adjacent
- Adjacent means next to something, not necessarily touching it.
- continuous
- Continuous emphasizes an unbroken extent rather than contact between parts.