map

English

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A map of the world.

Etymology

Shortening of Middle English mapemounde(world map), Old French mapamonde, from Medieval Latin mappa mundī, compound of Latin mappa(napkin, cloth) and mundus(world), mappa.

Noun

map (plural maps)

1. A visual representation of an area, whether real or imaginary.
• 2012 March–April, Brian Hayes, “Pixels or Perish”, in American Scientist[1], volume 100, number 2, page 106:
Drawings and pictures are more than mere ornaments in scientific discourse. Blackboard sketches, geological maps, diagrams of molecular structure, astronomical photographs, MRI images, the many varieties of statistical charts and graphs: These pictorial devices are indispensable tools for presenting evidence, for explaining a theory, for telling a story.
2. A graphical representation of the relationships between objects, components or themes.
• 2012 March-April, Terrence J. Sejnowski, “Well-connected Brains”, in American Scientist[2], volume 100, number 2, page 171:
Creating a complete map of the human connectome would therefore be a monumental milestone but not the end of the journey to understanding how our brains work.
3. (mathematics) A function.
Let ${\displaystyle f}$ be a map from ${\displaystyle \mathbb {R} }$ to ${\displaystyle \mathbb {R} }$
4. The butterfly Araschnia levana.
5. (Britain, old-fashioned) The face.
• 1960, P. G. Wodehouse, Jeeves in the Offing, chapter X:
And as the eye rested on him, he too filled me with pity and terror, for his map was flushed and his manner distraught. He looked like Jack Dempsey at the conclusion of his first conference with Gene Tunney, the occasion, if you remember, when he forgot to duck.
6. (board games, computer games) A predefined and confined imaginary area where a game session takes place.
I don't want to play this map again!

Usage notes

For the most part, map and function are synonyms in mathematics, and are frequently used interchangably, however certain branches of mathematics sometimes use map in a specialised sense to mean a function that preserves some important property in that branch of mathematics, i.e. a morphism. For instance, in topology, map may specifically mean a continuous function, and in linear algebra it may specifically mean a linear transformation.

Verb

map (third-person singular simple present maps, present participle mapping, simple past and past participle mapped)

1. To create a visual representation of a territory, etc. via cartography.
2. To inform someone of a particular idea.
3. (mathematics, transitive, followed by a "to" phrase) To act as a function on something, taking it to something else.
${\displaystyle f}$ maps ${\displaystyle A}$ to ${\displaystyle B}$, mapping every ${\displaystyle a\in A}$ to ${\displaystyle f(a)\in B}$.

Cornish

Etymology

Cognate with Breton mab, Old Irish macc.

Noun

map m (plural mebyow)

Dutch

Pronunciation

•  Audio (file)
• Rhymes: -ɑp

Noun

map f (plural mappen, diminutive )

1. folder
2. (computing) directory, folder

map

1. .

map

Scottish Gaelic

Noun

map m (genitive singular map, plural mapaichean)

1. Alternative form of mapa

map

Welsh mutation