insertion

noun

in·​ser·​tion in-ˈsər-shən 

1

: something that is inserted: such as

a

: the part of a muscle that inserts

b

: the mode or place of attachment of an organ or part

c

: embroidery or needlework inserted as ornament between two pieces of fabric

d

: a section of genetic material that is inserted into an existing gene sequence

2

a

: the act or process of inserting

b

: the mutational process producing a genetic insertion

insertional

in-ˈsər-sh(ə-)nəl 

adjective

Examples of insertion in a Sentence

Treatment may include the insertion of a tube in his ear.

The report contains a number of insertions.

Recent Examples on the Web

One of those blew up on its landing attempt while another was purposefully expended to get its payload to a higher orbital insertion. —Richard Tribou, The Orlando Sentinel, 10 Mar. 2026

Multiple studies have shown birth control use is not associated with infertility, and for people desiring an IUD, there are many effective options to help manage discomfort with the insertion. —Karen Greiner, San Diego Union-Tribune, 10 Mar. 2026

What might follow would be the insertion of military engineers to exploit the scene to locate the uranium, but Mulroy says better intelligence is needed. —Luis Martinez, ABC News, 10 Mar. 2026

With Motion Rate 240 and MEMC frame insertion, action movies stay buttery smooth, while HDR Pro with Dolby Vision ensures every highlight pops. —Juhi Wadia, PC Magazine, 6 Mar. 2026

Word History

First Known Use

1539, in the meaning defined at sense 1

Rhymes for insertion

• assertion
• cistercian
• coercion
• desertion
• exertion
• mercian
• overexertion
• reassertion

Kids Definition

insertion

noun

in·​ser·​tion in-ˈsər-shən 

1

: the act or process of inserting

2

a

: something inserted

b

: the part of a muscle that is attached to a part to be moved

3

: the mode or place of attachment of an organ or part

Medical Definition

insertion

noun

in·​ser·​tion in-ˈsər-shən 

1

: the part of a muscle by which it is attached to the part to be moved compare origin sense 2

2

: the mode or place of attachment of an organ or part

3

a

: a section of genetic material inserted into an existing gene sequence

b

: the mutational process producing a genetic insertion

insertional

-shnəl, -shən-ᵊl 

adjective