built-in

1 of 2

adjective

ˈbilt-ˈin 

1

a

: forming an integral part of a structure or object

a camera with a built-in flash

especially : constructed as or in a recess in a wall

a built-in bookshelf

b

: built into the ground

a built-in swimming pool

2

a

: inherent

a built-in advantage

b

: already established

Their best-seller status gave them a built-in audience.

built-in

2 of 2

noun

ˈbilt-ˌin 

: a built-in piece of furniture

Synonyms of built-in

Adjective

• inherent
• intrinsic
• integral
• essential

Examples of built-in in a Sentence

Adjective

a poker player with a seemingly built-in ability to read his opponents' faces

Recent Examples on the Web

Adjective

Multi-Speaker Connectivity Because the speakers have Auracast built-in, Marshall users can expand their audio setup and play music in sync across multiple Acton IV and Stanmore IV speakers. — Mark Sparrow, Forbes.com, 7 July 2026

These include a mail sorting station, built-in charging areas on the shelves for phones, and bulletin boards or pin-up spaces for notes and calendars. — Michelle Mastro, The Spruce, 4 July 2026

For more active outings or studio sessions, the quick-drying Quince Performance Tech Wide-leg Pants feature built-in sun protection. — Sophie Dodd, Travel + Leisure, 2 July 2026

Achieve the same style with Quince’s Luna pair, which mirrors Gaines’ silhouette and has built-in stretch for comfortable, all-day wear and a just-right mid-rise fit. — Shea Simmons, PEOPLE, 1 July 2026

Word History

First Known Use

Adjective

1852, in the meaning defined at sense 1a

Noun

1919, in the meaning defined above

Rhymes for built-in

• akin
• auxin
• buckskin
• chagrin
• crankpin
• deerskin
• foreskin
• fuchsin
• herein
• kingpin
• linchpin
• pigskin

Kids Definition

built-in

adjective

ˈbil-ˈtin

1

: forming a permanent part of a structure or object

built-in bookcases

2

: built into the ground

a built-in swimming pool