# surface

Pronunciation: US say "SUR-fuhs" /ˈsɝːfəs/; UK say "SUR-fis" /ˈsɜːfɪs/

## Noun

1. The outside or top layer of something, such as the top of a table, the outer side of a solid object, or the top of a body of water.
   - Simple: The top or outside part of something, like the top of a table or of water.
   - _Oil floated in a thin film across the surface of the water._
   - _She polished the wooden surface until it gleamed._
3. The outward or external appearance of something, as distinct from its deeper reality.
   - Simple: The way something looks from the outside, not what is really going on inside.
   - _Beneath a friendly surface, the negotiations were deeply tense._
   - _Her cheerful surface concealed years of private grief._
6. A two-dimensional shape, flat or curved, such as one traced out by an equation in a space of three or more dimensions.
   - Simple: A flat or curved two-dimensional shape studied in math.
   - _The equation describes a smooth surface curving through three-dimensional space._
   - _Mathematicians study how surfaces bend and connect in higher dimensions._

## Adjective

2. Found on or having to do with the outer layer of something, or affecting only the outside and not deep or genuine; used before a noun.
   - Simple: On the outside or top of something, or only on the outside and not deep or real.
   - _Heavy rain washed away the surface soil in the vegetable garden._
   - _Beneath his surface charm lay a cold and calculating nature._

## Verb

4. To appear, become known, or come to light after being hidden, absent, or unnoticed.
   - Simple: To appear or become known after being hidden or away for a time.
   - _Fresh evidence surfaced during the second week of the trial._
   - _Concerns about safety eventually surface in every large project._
5. To rise up to the surface of a body of water.
   - Simple: To come up to the top of the water.
   - _Submarines surface to recharge their batteries and take on air._
   - _The seal surfaced for a moment, then dove again._
7. To bring information, facts, or content to public attention; to make it known.
   - Simple: To make facts or information known to others.
   - _Investigators worked for months to surface the truth behind the scandal._
   - _The new search tool surfaces relevant documents almost instantly._
8. To apply a finished layer or covering to something, such as paving a road or coating a floor.
   - Simple: To put a top layer or covering on something, like a road.
   - _The contractor surfaced the driveway with smooth concrete._
   - _They will surface the tennis court with a textured acrylic coating._
9. To bring something up to the surface from below, especially from underwater.
   - Simple: To bring something up to the top, especially from under water.
   - _With the batteries running low, the commander had no choice but to surface the submarine in enemy waters._
   - _The research team surfaced the robot submersible at dusk and hauled it aboard to download its data._

## Other meanings

- (verb) To extract minerals by working a mine at or near ground level rather than deep below.
- (noun) The plausible sentence or image a cryptic clue presents when read literally, ignoring the hidden wordplay.

## Origin

Borrowed from French "surface." It is a doublet of "superficies."

Source: DictionaryAI, https://dictionaryai.com/define/surface (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).