1

id

play
noun \ˈid\

Definition of id

  1. :  the one of the three divisions of the psyche in psychoanalytic theory that is completely unconscious and is the source of psychic energy derived from instinctual needs and drives — compare ego, superego

Did You Know?

In Latin, id means simply "it". Sigmund Freud (and his translator) brought the word into the modern vocabulary as the name of what Freud believed to be one of the three basic elements of the human personality, the other two being the ego and the superego. According to Freud, the id is the first of these to develop, and is the home of the body's basic instincts, particularly those involving sex and aggression. Since the id lacks logic, reason, or even organization, it can contain conflicting impulses. Primitive in nature, it wants to be satisfied immediately. Although its workings are completely unconscious, Freud believed that its contents could be revealed in works of art, in slips of the tongue ("Freudian slips"), and in one's dreams.

Origin and Etymology of id

New Latin, from Latin, it


First Known Use: 1924


2

id

abbreviation

Definition of id

  1. idem


1

ID

play
noun \ˈī-ˈdē\

Definition of ID

plural

ID's

or

IDs

  1. :  a document (as a card) bearing identifying information about and often a photograph of the individual whose name appears on it —called also ID card, identification card, identity card

Examples of id in a sentence

  1. The police have not yet ID'd the victim.

  2. <studies that show that eyewitnesses are surprisingly unreliable when called upon to ID the perpetrators of crimes>

Did You Know?

In Latin, id means simply "it". Sigmund Freud (and his translator) brought the word into the modern vocabulary as the name of what Freud believed to be one of the three basic elements of the human personality, the other two being the ego and the superego. According to Freud, the id is the first of these to develop, and is the home of the body's basic instincts, particularly those involving sex and aggression. Since the id lacks logic, reason, or even organization, it can contain conflicting impulses. Primitive in nature, it wants to be satisfied immediately. Although its workings are completely unconscious, Freud believed that its contents could be revealed in works of art, in slips of the tongue ("Freudian slips"), and in one's dreams.

1941

First Known Use of id

1941


2

ID

play
verb \ˈī-ˈdē\

Definition of ID

ID'd

or

IDed

ID'ing

or

IDing

  1. transitive verb
  2. :  identify <ID'd the thief>


3

ID

abbreviation

Definition of ID

  1. 1 Idaho

  2. 2 identification

  3. 3 independent distributor

  4. 4 industrial design

  5. 5 often not capitalized inside diameter; inner diameter; internal diameter

  6. 6 often not capitalized inside dimensions

  7. 7 intelligence department


1

-id

noun suffix

Definition of -id

  1. 1 :  one belonging to a (specified) dynastic line <Abbasid>

  2. 2 :  meteor associated with or radiating from a (specified) constellation or comet <Perseid>

Origin and Etymology of -id

in sense 1, from Latin -ides, masculine patronymic suffix, from Greek -idēs; in sense 2, from Italian -ide, from Latin -id-, -is, feminine patronymic suffix, from Greek


2

-id

noun suffix

Definition of -id

  1. :  body :  particle <chromatid>

Origin and Etymology of -id

probably from Latin -id-, -is, feminine patronymic suffix, from Greek



ID Defined for English Language Learners

1

id

play
noun \ˈid\

Definition of id for English Language Learners

  • psychology : a part of a person's unconscious mind that relates to basic needs and desires


1

ID

play
noun \ˈī-ˈdē\

Definition of ID for English Language Learners

  • : a document, card, etc., that has your name and other information about you and that often includes your photograph


2

ID

play
verb \ˈī-ˈdē\

Definition of ID for English Language Learners

  • : to find out the identity of (someone or something)


ID Defined for Kids

ID

play
abbreviation

Definition of ID for Students

  1. 1 Idaho

  2. 2 identification


Medical Dictionary

1

id

play
noun \ˈid\

Medical Definition of id

  1. :  the one of the three divisions of the psyche in psychoanalytic theory that is completely unconscious and is the source of psychic energy derived from instinctual needs and drives—compare ego, superego


2

id

noun

Medical Definition of id

  1. :  a skin rash that is an allergic reaction to an agent causing an infection <a syphilitic id> <tinea pedis and the vesicular ids arising from it—Journal of the American Medical Association>—compare bacterid


id

abbreviation

Medical Definition of id

  1. the same

Origin and Etymology of id

Latin idem


ID

abbreviation

Medical Definition of ID

  1. 1identification

  2. 2inside diameter; internal diameter

  3. 3intradermal



Seen and Heard

What made you want to look up id? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a Mesopotamian temple tower

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ