primer

1 of 2

noun (1)

prim·​er ˈpri-mər 

chiefly British ˈprī-mə

1

: a small book for teaching children to read

2

: a small introductory book on a subject

3

: a short informative piece of writing

primer

2 of 2

noun (2)

prim·​er ˈprī-mər 

1

: a device for priming

especially : a cap, tube, or wafer containing percussion powder or compound used to ignite an explosive charge

2

: material used in priming a surface

called also prime coat

3

: a molecule (such as a short strand of RNA or DNA) whose presence is required for formation of another molecule (such as a longer chain of DNA)

Did you know?

Primers were once a standard part of every child's education. The first primer printed in North America, The New England Primer (ca. 1690), was typical; it contained many quotations from the Bible and many moral lessons, and the text was accompanied by numerous woodcut illustrations. We no longer use the word in early education, but it's widely used in everyday speech. Notice how primer is pronounced; don't mix it up with the kind of paint that's pronounced with a long *i *sound.

Synonyms of primer

Noun (1)

• handbook
• manual
• textbook
• text

Examples of primer in a Sentence

Noun (1)

a primer of human anatomy

Recent Examples on the Web

Noun

With both courtesies and catastrophes refusing to conform, the canton’s school board, publishers, and clergy were forced to produce multiple editions of primers, textbooks, and catechisms; sometimes five parallel print runs were needed for a population the size of a town. —Simon Akam, New Yorker, 1 Dec. 2025

To preserve their quality, store cans of primers, stains, and spray paints in a cool, dark place like your basement, not your outdoor shed. —Mary Cornetta, Better Homes & Gardens, 29 Nov. 2025

This two-part primer from Cassie LaBelle is very helpful and is a great resource to send to friends and families before arriving. —Sydney Bauer, Them., 21 Nov. 2025

As the holiday approaches, here's a primer on key elements of Día de los Muertos. —Michelle Del Rey, USA Today, 31 Oct. 2025

Word History

Etymology

Noun (1)

Middle English, "layperson's prayer book," borrowed from Anglo-French, borrowed from Medieval Latin prīmārius, prīmārium, noun derivatives from masculine and neuter of prīmārius "lying at the beginning, primary entry 1"

Noun (2)

prime entry 3 + -er entry 2

First Known Use

Noun (1)

14th century, in the meaning defined at sense 1

Noun (2)

1650, in the meaning defined at sense 2

Rhymes for primer

• climber
• dimer
• eimer
• rhymer
• timer
• alzheimer
• heterodimer

Kids Definition

primer

1 of 2 noun

prim·​er ˈprim-ər 

especially British ˈprī-mər

1

: a small book for teaching children to read

2

: a book that introduces a subject

a primer of chemistry

3

: a short informative piece of writing

a primer on healthy eating

primer

2 of 2 noun

prim·​er ˈprī-mər 

1

: a device (as a cap or tube) containing a small explosive charge that is used for setting off a larger explosive charge (as in a cartridge)

2

: material used in priming a surface

Medical Definition

primer

noun

prim·​er ˈprī-mər 

: a molecule (as a short strand of RNA or DNA) whose presence is required for formation of another molecule (as a longer chain of DNA)