missing

adjective

miss·​ing ˈmi-siŋ 

1

: absent

a missing tooth

also : lost

my keys are missing

—sometimes used in the phrase go missing

My keys have gone missing.

2

: needed or expected but not included

It's a good sauce, but something is missing.

Synonyms of missing

• lost
• gone
• misplaced

Examples of missing in a Sentence

The new director has provided the missing ingredient that was needed for the show's success.

the missing socks turned up in the dog's special hiding place

Recent Examples on the Web

After Milo goes missing, Marissa and her husband Peter (Lacy) launch a frantic search for their son. —Jordana Comiter, PEOPLE, 11 Nov. 2025

Perilous Voyages More than 5,100 Rohingya have taken boats to leave Myanmar and Bangladesh between January and early November this year, with nearly 600 people reported dead or missing, according to data from the UN Refugee Agency. —Reuters, CNN Money, 9 Nov. 2025

Comfortable slides just might be what his footwear’s missing. —John Lonsdale, Travel + Leisure, 7 Nov. 2025

Tracking those down could lead to the missing source. —Christopher Cruz, Rolling Stone, 7 Nov. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing missing

• missing in action
• missing link
• missing person report
• someone doesn't know what he/she is missing

Rhymes for missing

• hissing
• kissing
• characterising
• dismissing
• nipissing
• reminiscing

Kids Definition

missing

adjective

miss·​ing ˈmis-iŋ 

: absent entry 1 sense 1, lost

missing persons

missing in action