incomplete

adjective

in·​com·​plete ˌin-kəm-ˈplēt 

1

: not complete : unfinished: such as

a

: lacking a usually necessary part, element, or step

spoke in incomplete sentences

an incomplete set of golf clubs

an incomplete diet

b

of protein : deficient in one or more essential amino acids

People used to think you needed to eat incomplete proteins together in the same meal to make up a complete protein, but that view has been debunked; simply eat a variety of plant-based protein sources throughout the day and you'll be fine.

—Katherine Hobson

c

: lacking one or more sets of floral organs

an incomplete flower without stamens

2

of a football pass : not legally caught

3

of insect metamorphosis : characterized by the absence of a pupal stage between the immature stages and the adult of an insect in which the young usually resemble the adult compare complete sense 6

incompletely adverb

incompleteness noun

Synonyms

• deficient
• partial
• unfinished
• fragmentary
• fragmental

Examples of incomplete in a Sentence

an incomplete set of encyclopedias

She handed in an incomplete assignment.

Recent Examples on the Web

This stems from outdated assumptions and an incomplete understanding of what Ph.D. training entails. —Leadership Brainery, Forbes.com, 4 Aug. 2025

Wilson then threw an incomplete pass, to nobody in particular... —Barry Jackson, Miami Herald, 3 Aug. 2025

Green also threw low and incomplete for CJ Brown and connected with running back Mike Washington Jr. on a swing pass over the right edge. —Tom Murphy, Arkansas Online, 1 Aug. 2025

No matter where the money comes from, there’s nothing exclusionary about research focusing on female athletes, Dr. Ode says—without it, players like Vandersloot and Brink, and their support teams, have incomplete and inaccurate information. —Cindy Kuzma, SELF, 31 July 2025

Word History

Etymology

Middle English incompleet, from Late Latin incompletus, from Latin in- + completus complete

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for incomplete

• bittersweet
• celestite
• indiscreet
• marguerite
• obsolete
• overeat
• overheat
• parakeet
• stillingfleet
• superheat
• amit
• athlete

Kids Definition

incomplete

adjective

in·​com·​plete ˌin-kəm-ˈplēt 

: not complete : lacking some part

handed in an incomplete assignment

incompletely adverb

incompleteness noun

Medical Definition

incomplete

adjective

in·​com·​plete ˌin-kəm-ˈplēt 

1

of insect metamorphosis : having no pupal stage between the immature stages and the adult with the young insect usually resembling the adult compare complete sense 1

2

of a bone fracture : not broken entirely across compare complete sense 2

3

of a protein : deficient in one or more essential amino acids compare complete sense 3

4

: characterized by incomplete dominance

an incomplete trait