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
- In addition, nanotextured surfaces have been proposed for nanohybridization using a defined surface covered with nanostructures 5 .
- The diver pierced the surface of the water with scarcely a splash.
- Follow the urbexers as they navigate the inner and outer surfaces of our forbidden cities.
- Used in the Ending of Sentence
- Additionally, spheroids in suspension cultures can aggregate and refragment due to interactions with each other, the spin bar or the vessel surfaces.
- SEM of the apopyles with apopylar cells and choanocyte chamber remaining on the wound surface.
- The experimental arrangement allows preshot and postshot microscopy of the entrance surface, and minor damage can be detected on even a structured 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.