I. in-ˈsərt verb
Etymology: Latin insertus, past participle of inserere, from in- + serere to join — more at series
Date: 1529
transitive verb
1. : to put or thrust in
insert the key in the lock
insert a spacecraft into orbit
2. : to put or introduce into the body of something : interpolate
insert a change in a manuscript
3. : to set in and make fast ; especially : to insert by sewing between two cut edges
4. : to place into action (as in a game)
insert a new pitcher
intransitive verb
of a muscle : to be in attachment to the part to be moved
Synonyms: see introduce
• in·sert·er noun
II. ˈin-ˌsərt noun
Date: circa 1889
: something that is inserted or is for insertion ; especially : written or printed material inserted (as between the leaves of a book)