Dictionary.com
Thesaurus.com
Synonyms

dad

1 American  
[dad] / dæd /

noun

  1. a person’s father or one’s father.

  2. a person who is corny or embarrassing in the way that a father figure might be.

    He was being such a dad when he told that story.

  3. a term of endearment used to refer to a man or boy who is admired.

    A bunch of teens commented “HI DAD!” on the rapper’s post.


adjective

  1. corny or embarrassing in the way that a father figure might be: the most dad story ever.

    a dad joke;

    the most dad story ever.

  2. handsome or stylish; amazing; to be admired.

    Those shoes are totally dad.

verb (used with object)

  1. to act as a father toward; act paternally toward.

    Stop dadding me about my grades!

  2. to refer to (an admired man or boy) as “dad”.

    My friends dad me whenever I look good.

verb (used without object)

  1. to perform the tasks or duties of a male parent; act paternally.

    He dads like a champ.

  2. to refer to an admired man or boy as “dad”.

    They dad whenever a new photo pops up on their feeds.

dad 2 American  
[dad] / dæd /

interjection

Informal.
  1. God (used in combination in mild oaths).

    dad-blamed; dad-gummed.


dad 3 American  
[dad] / dæd /

noun

Scot. and North England.
  1. a solid blow or knock.

  2. a large slice, lump, or portion.


ḍad 4 American  
[dahd] / dɑd /

noun

  1. the 15th letter of the Arabic alphabet.


dad British  
/ dæd /

noun

  1. an informal word for father

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of dad1

First recorded in 1530–40; probably originally baby talk dah-dah

Origin of dad2

First recorded in 1670–80; euphemism for God; Gad 1 ( def. )

Origin of dad3

First recorded in 1710–20; probably variant of dab 1

Origin of ḍad4

From Arabic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The radio DJ took Friday's breakfast show off last minute to be with his family when his dad's heart surgery didn't go to plan on Thursday.

From BBC

I’m close to my dad, and my dad is, I would also say a vulnerability cheerleader, and a very refreshingly emotional Englishman.

From Los Angeles Times

He said he grew up watching his dad help service members at the store, which opened in 1972.

From Los Angeles Times

Director Prosit Roy, who is father to a toddler daughter, describes himself as "a girl dad" and says he made the film to challenge "old ideas and archaic values".

From BBC

Graham’s tweaked, sensitive patriarch is tantalizingly far from the heartbreaking dad of “Adolescence” and the gloriously oddball Riseborough makes the most of her faint-voiced mom’s severity.

From Los Angeles Times