Word.ws English Dictionary

ap

ap is the abbreviation of apothecaries' system.

Meaning of apothecaries' system

Noun

apothecaries' system

  1. (historical) A particular system of measuring mass and volume.

Adjective capitalized: AP

AP (not comparable)

  1. (abbreviation, initialism) Initialism of all-purpose.
  2. (abbreviation, initialism) Initialism of alternately placed.
  3. (abbreviation, initialism) Initialism of anteroposterior.
    • AP radiograph shows an exophytic type of exostosis. [image caption]2016, B.J. Manaster, “Osteochondroma”, in B.J. Manaster, editor, Diagnostic Imaging: Musculoskeletal: Non-Traumatic Disease, 2nd edition, Philadelphia, PA: Elsevier, →ISBN, page 250
  4. (abbreviation, initialism) Initialism of anti-personnel.
  5. (abbreviation, initialism) Initialism of armor-piercing.

Noun (1) capitalized: AP

AP (countable and uncountable, plural APs)

  1. (US, countable) An Advanced Placement program.
  2. (countable) An Audemars Piguet watch.
    • I put her in a new AP2018-19, Roddy Rich, Ballin' (song)
    • I keep my niggas private, so his AP all I'm showing2020, Megan Thee Stallion, Savage (song)
  3. (abbreviation, countable, initialism) Initialism of access point.
  4. (abbreviation, initialism, uncountable) Initialism of accounts payable.
  5. (abbreviation, initialism, uncountable) Initialism of acetylpyrroline.
  6. (abbreviation, countable, initialism) Initialism of action point.
    • Weapon attacks by your team members don't cost AP, but their special skills do, so managing these and exploiting them to target enemy weaknesses is key.2025 February, Robert Jones, “Clair Obscur: Expedition 33”, in PC Gamer (US), number 392, page 30
  7. (abbreviation, countable, initialism) Initialism of adjective phrase or adverbial phrase.
  8. (abbreviation, countable, initialism) Initialism of advantage player.
  9. (abbreviation, initialism, uncountable) Initialism of aerosolized pentamidine.
    • He pointed out that the annual cost of AP prophylaxis is $2100, and that a single hospitalization for pneumocystis carinii pneumonia (PCP) costs six times that amount. (AP is generally regarded as an effective preventive for PCP)1989 April 22, Chris Bull, “Medicare Planning To Cut Funding For AIDS Drugs”, in Gay Community News, page 1
  10. (abbreviation, countable, initialism) Initialism of affair partner.
  11. (abbreviation, uncountable) Abbreviation of all-purpose flour.
  12. (abbreviation, initialism, uncountable) Initialism of age progression.
    Antonyms:
    AR
Show 9 more meaningsShow fewer meanings
  1. (US, abbreviation, initialism, uncountable) Initialism of American plan.
  2. (abbreviation, initialism, uncountable) Initialism of attachment parenting.
  3. (abbreviation, countable, initialism) Initialism of authorized participant.
  4. (abbreviation, countable, initialism) Initialism of automatic payment.
  5. (US, abbreviation) Abbreviation of Auxiliary Provisions (a naval transport).
  6. (abbreviation, initialism, uncountable) Initialism of ammonium perchlorate.
  7. (abbreviation, initialism, uncountable) Initialism of acute pancreatitis.
  8. (abbreviation, countable, initialism) Initialism of additional protocol.
  9. (abbreviation, countable, initialism, rhythm games) Initialism of all perfect.

Proper noun capitalized: AP

AP

  1. (abbreviation, initialism) Initialism of ActivityPub.
  2. (US, abbreviation, initialism) Initialism of Advanced Placement.
    • Joel is AP everything and he's applied to Harvard, so I guess his dad isn't taking any chances.2010, Jennifer Egan, “Ask Me if I Care”, in A Visit from the Goon Squad
  3. (abbreviation, initialism) Initialism of Associated Press.
    • Always consult the official Associated Press Stylebook for other AP questions and guidelines. The KSU Writing Center has current AP books available for use, as well as Writing Assistants to help you with AP format.2025 September 26 (last accessed), “AP STYLE: GENERAL RULES”, in Kennesaw State University, archived from the original on 26 Sep 2025, page 2
  4. (US, abbreviation, initialism) Initialism of Armed Forces – Pacific.
    • APO/FPO AP ZIPs 962-966 — Space Available Mail, Nov. 26; Parcel Airlift Mail, Dec. 3; Priority Mail, Dec. 10; First Class Mail Letters and Cards, Dec. 10 and Express Mail Military Service, Dec. 18.2010 October 29, Bill Shrum, “Shipping to soldiers for the holidays”, in Stuttgart (Arkansas) Daily Leader
  5. (abbreviation) Abbreviation of Amapá: a state of Brazil.
  6. (abbreviation, initialism) Initialism of Andhra Pradesh: a state of India.
  7. (abbreviation) Abbreviation of Arabian Plate: a tectonic plate.

Noun (2) capitalized: Ap

Ap

  1. (abbreviation) Abbreviation of April.

Antonyms of ap

Forms of ap

pluralAPs

Origin of ap

Abbreviation of apothecaries'.

Words formed from ap

Phrases with ap

Questions about ap

What does ap mean?
Ap means an Advanced Placement program.
What is ap the abbreviation of?
Ap is the abbreviation of apothecaries' system.
What part of speech is ap?
Ap can be an adjective, a noun or a proper noun.

Words near ap in the dictionary

  1. Aoy
  2. Aoyama
  3. Aoyamas
  4. Aoyituogelake
  5. Aoys
  6. ap
  7. Ap Lei Chau
  8. Ap Ma
  9. ap't
  10. ap'ts
  11. ap-

Source and license

Adapted from Wiktionary: ap (page history and authors); AP (page history and authors); Ap (page history and authors); apothecaries' system (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “ap.” Word.ws, https://word.ws/ap. Based on Wiktionary, CC BY-SA 4.0.