1

ad

noun, often attributive \ ˈad \

Definition of ad

1 :advertisement 1
  • newspapers ads
  • TV ads for new cars
2 :advertising
  • an ad agency

First Known Use of ad

1799


2

ad

noun

Definition of ad

First Known Use of ad

1915


AD

abbreviation

Definition of AD

1 active duty
2 after date
3 Alzheimer's disease
4 anno Domini often printed in small capitals and often punctuated
5 assembly district
6 assistant director
7 athletic director

A/D

abbreviation

Definition of A/D

analog/digital

ad-

prefix
variants: or ac- or af- or ag- or al- or ap- or as- or at-

Definition of ad-

1 :to :toward usually ac- before c, k, or q
  • acculturation
and af- before f
  • affluent
and ag- before g
  • aggradation
and al- before l
  • alliteration
and ap- before p
  • apportion
and as- before s
  • assuasive
and at- before t
  • attune
and ad- before other sounds but sometimes ad- even before one of the listed consonants
  • adsorb
2 :near :adjacent to in this sense always in the form ad-
  • adrenal

Origin and Etymology of ad-

Middle English, from Anglo-French & Latin; Anglo-French, from Latin, from ad — more at at


1

-ad

adverb suffix

Definition of -ad

:in the direction of :toward
  • cephalad

Origin and Etymology of -ad

Latin ad


2

-ad

noun suffix

Definition of -ad

:member of a botanical group
  • bromeliad

Origin and Etymology of -ad

probably from New Latin -ad-, -as, from Greek, suffix denoting descent from or connection with



AD Defined for Kids

ad

noun \ ˈad \

Definition of ad for Students


A.D.

abbreviation

Definition of A.D. for Students

in the year of our Lord Hint: A.D. is an abbreviation for the Latin phrase anno Domini, which means “in the year of our Lord.”

Medical Dictionary

AD

abbreviation

medical Definition of AD

3
[Latin auris dextra]
right ear used especially in audiology and in writing medical prescriptions
4 average deviation


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