di

¹

Or Di

[dee]

preposition

1. from; of: used in Italian personal names, originally to indicate place of origin.

   Conte di Savòia.

di-

²

1. a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double” (diphthong ); on this model, freely used in the formation of compound words (dicotyledon; dipolar ) and in chemical terms (diatomic; disulfide ).

di

³

[dee]

noun

Music.

1. a tone in the ascending chromatic scale between do and re.

di-

⁴

1. variant of dis- before b, d, l, m, n, r, s, v, and sometimes g and j: digest; divide.

di-

⁵

1. variant of dia- before a vowel.

   diorama.

Di

⁶

[dahy]

noun

1. a female given name, form of Diana.

Di

⁷

Symbol, Chemistry.

1. didymium.

DI

⁸

1. Department of the Interior.

2. drill instructor.

di.

⁹

Or dia

abbreviation

1. diameter.

di-

¹

prefix

1. twice; two; double

   dicotyledon

2. 1. containing two specified atoms or groups of atoms

      dimethyl ether

      carbon dioxide

   2. a nontechnical equivalent of bi- 1

di-

²

combining form

1. variant of dia-

   diopter

DI

³

abbreviation

1. Defence Intelligence

2. Detective Inspector

3. Donor Insemination

Di

⁴

symbol

1. didymium

di–

1. A prefix that means “two,” “twice,” or “double.” It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms.

Word History and Origins

Origin of di–¹

< Italian < Latin dē

Origin of di–²

Middle English ≪ Latin < Greek, combining form representing dís twice, double, akin to dýo two. See bi- ¹, twi-

Origin of di–³

Perhaps alteration of do ²

Word History and Origins

Origin of di–¹

via Latin from Greek, from dis twice, double, related to duo two. Compare _bi- ¹

Example Sentences

However, Pepe Di'Iasio, general secretary of the Association of School and College Leaders, said attendance hubs were not a "silver bullet" and a more "strategic approach" was needed.

From BBC

Pepe Di'Iasio, general secretary of the Association of School and College leaders and former head teachers, said more research was needed into why girls were falling behind.

From BBC

Goldbridge, 46, whose real name is Brent Di Cesare, was named among the rights holders of Germany's top-flight for 20 live Friday night matches for the 2025-26 season.

From BBC

"She does have the bullet still lodged in her brain," DI Dalloway said.

From BBC

Not having to worry about money was also huge help for theology student Di'Mario Downer.

From BBC