affine

noun
af·​fine | \a-ˈfīn, ə-\

Definition of affine 

(Entry 1 of 2)

: a relative by marriage : in-law

affine

adjective

Definition of affine (Entry 2 of 2)

: of, relating to, or being a transformation (such as a translation, a rotation, or a uniform stretching) that carries straight lines into straight lines and parallel lines into parallel lines but may alter distance between points and angles between lines affine geometry

Other Words from affine

Adjective

affinely adverb

First Known Use of affine

Noun

circa 1509, in the meaning defined above

Adjective

1896, in the meaning defined above

History and Etymology for affine

Noun

borrowed from Anglo-French affin, going back to Latin affīnis "neighbor, relation by marriage," noun derivative of affīnis "bordering (on), related by marriage" — more at affinity

Adjective

borrowed from New Latin affīnis, taken to mean "having affinity," going back to Latin, "bordering (on), connected (with)" — more at affinity

Keep scrolling for more

Learn More about affine

Statistics for affine

Look-up Popularity

Time Traveler for affine

The first known use of affine was circa 1509

See more words from the same year

Keep scrolling for more

More Definitions for affine

affine

noun
af·​fine | \a-ˈfīn, ə- \

Legal Definition of affine 

: a relative by marriage — compare blood relative

Other Words from affine

affinal \ -​ˈfī-​nəl \ adjective

History and Etymology for affine

Middle French affin, from Latin affinis, from affinis related, from ad to + finis end, border

More from Merriam-Webster on affine

See words that rhyme with affine

Comments on affine

What made you want to look up affine? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

something that serves to warn or remind

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!