surface meaning
EN
[ˈsɝːfɪs] 
US WSurface
- In mathematics, specifically, in topology, a surface is a two-dimensional, topological manifold.
- To say that a surface is "two-dimensional" means that, about each point, there is a coordinate patch on which a two-dimensional coordinate system is defined.
- The concept of surface finds application in physics, engineering, computer graphics, and many other disciplines, primarily in representing the surfaces of physical objects.
FR surface 
- NounPLsurfacesPREsur-SUF-ace
- The overside or up-side of a flat object such as a table, or of a liquid.
- A very neat old woman, still in her good outdoor coat and best beehive hat, was sitting at a polished mahogany table on whose surface there were several scored scratches so deep that a triangular piece of the veneer had come cleanly away,  [ …] .
- The outside hull of a tangible object.
- Of all the transitions brought about on the Earth’s surface by temperature change, the melting of ice into water is the starkest. It is binary. And for the land beneath, the air above and the life around, it changes everything.
- (figuratively) Outward or external appearance.
- On the surface, the spy looked like a typical businessman.
- (mathematics, geometry) The locus of an equation (especially one with exactly two degrees of freedom) in a more-than-two-dimensional space.
- (fortification) That part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion.
- The overside or up-side of a flat object such as a table, or of a liquid.
- VerbSGsurfacesPRsurfacingPT, PPsurfaced
- More Examples
- Used in the Middle of Sentence
- As an economy measure, the manufacturer decided to use iron rather than steel, but to acierate the surface to limit oxidation.
- Disabling network access to unused ports reduces surface area.
- Operculum ( Op ) broad, longer than the bursa, distally narrowing into a rounded apical process bearing ca. 10 setae, anterior surface subdistally with shallow concavity ( C ).
- Used in the Ending of Sentence
- One of the strategies for the prevention of such microbial adhesion is to modify the biomaterials by creating micro or nanofeatures on their surface.
- However, they can be discovered by compressed electroweakino searches at a 100 TeV collider, completing the full coverage of the relic neutralino surface.
- The damaged submarine came up successfully, but was incapable of resubmerging and was captured on the surface.
- Used in the Middle of Sentence
Definition of surface in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Intransitive verbs
- Transitive verbs
- Intransitive verbs
- Nouns
Source: Wiktionary
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Grammatically, this word "surface" is a noun, more specifically, a countable noun. It's also a verb, more specifically, an intransitive verb and a transitive verb.