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, 4 June 2026

Robinson was also a catalyst in TCU making the NCAA Tournament, as his insertion into the starting lineup against a top-five Iowa State team in February was the start of the last-season surge that took TCU off the bubble. —Steven Johnson june 2, Fort Worth Star-Telegram, 2 June 2026

For missions requiring multiple burn periods, such as orbit insertion followed by a later apogee kick, this limitation has historically pushed designers toward liquid or hybrid systems. —Aditya Jadhav, Interesting Engineering, 1 June 2026

Most CGMs handle insertion in a single press, with very little to feel. —Samantha Agate, Kansas City Star, 28 May 2026

Word History

First Known Use

1539, in the meaning defined at sense 1

Rhymes for insertion

• assertion
• cistercian
• coercion
• desertion
• exertion
• mercian
• tertian
• 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