ADV is a three-letter acronym and abbreviation that may refer to:

• The abbreviation for the word Adverb
• The abbreviation for the words Advertising/Advertisement
• A.D. Vision, a defunct multimedia entertainment company based in Houston, Texas, and its subsidiaries:
  • ADV Films, a former publisher of anime and tokusatsu videos
  • ADV Manga, a former publisher of manga
  • ADV Music
• Acoustic Doppler Velocimetry, in flow measurement
• Adventure type of visual novel.
• Aleutian Disease Virus, a disease of ferrets and minks, or the virus that causes it
• International Air Transport Association airport code for Andover Airfield – Andover, Hampshire, United Kingdom.
• The National Rail code for Andover railway station, United Kingdom.
• Average Daily Volume (trading)
• Auditable Dollar Value (Auditing)
• The abbreviation for the famous French Apéro du Vendredi that used to take place in Paris' suburbia (2005–2011)
• Adv. - Adversary in law.

An adverb is a part of speech that changes the meaning of verbs or any part of speech other than nouns (modifiers of nouns are primarily adjectives and determiners). Adverbs can modify verbs, adjectives (including numbers), clauses, sentences, and other adverbs.