AB, Ab, or ab may refer to:
Abraham Lincoln (/ˈeɪbrəhæm ˈlɪŋkən/; February 12, 1809 – April 15, 1865) was an American politician and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865. Lincoln led the United States through its Civil War—its bloodiest war and perhaps its greatest moral, constitutional, and political crisis.
Abortion is the ending of pregnancy by removing a fetus or embryo before it can survive outside the uterus.
Abu Dhabi (US /ˈɑːbuː ˈdɑːbi/, UK /ˈæbuː ˈdɑːbi/; Arabic: أبو ظبي Abū Ẓabī Emirati pronunciation [ɐˈbuˈðˤɑbi]) is the capital and the second most populous city of the United Arab Emirates (the most populous being Dubai), and also capital of the Emirate of Abu Dhabi, the largest of the UAE's seven emirates.
The Abbasid Caliphate (/əˈbæsᵻd/ or /ˈæbəsᵻd/ Arabic: الخلافة العباسية al-Khilāfah al-‘Abbāsīyah) was the third of the Islamic caliphates to succeed the Islamic prophet Muhammad.
Abraham (Avraham) (/ˈeɪbrəˌhæm, -həm/ ABE-raham; Hebrew: אַבְרָהָם, listen ), originally Abram, is the first of the three patriarchs of Judaism.
Abrahamic religions, emphasizing and tracing their common origin to the tribal patriarch Abraham or recognizing a spiritual tradition identified with him, are one of the major divisions in comparative religion (along with Indian, Iranian, and East Asian religions).
Absinthe (/ˈæbsɪnθ/ or /ˈæbsænθ/; French: [apsɛ̃t]) is historically described as a distilled, highly alcoholic (45–74% ABV / 90–148 U.S.
Abdullah II bin Al-Hussein (Arabic: عبد الله الثاني بن الحسين, ʿAbdullāh aṯ-ṯānī ibn Al-Ḥusayn, born 30 January 1962) has been king of Jordan since the 1999 death of his father, King Hussein.
Abū Bakr al-Baghdadi (Arabic: أبو بكر البغدادي; born 28 July 1971 as Ibrahim Awad Ibrahim al-Badri إبراهيم عواد إبراهيم علي محمد البدري السامرائي) is the leader of the Sunni militant terrorist organisation known as the Islamic State of Iraq and the Syria, which controls territory in western Iraq, Syria, Libya and Afghanistan.