ARB, ARb or arb may refer to:
Arbitration, a form of alternative dispute resolution (ADR), is a technique for the resolution of disputes outside the courts.
In economics and finance, arbitrage (US /ˈɑːrbᵻtrɑːʒ/, UK /ˈɑːbᵻtrɪdʒ/, UK /ˌɑːbᵻtrˈɑːʒ/) is the practice of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance, the profit being the difference between the market prices.
Arbor Day (or Arbour; from the Latin arbor, meaning tree) is a holiday in which individuals and groups are encouraged to plant and care for trees.
An arbuscular mycorrhizal fungus (plural mycorrhizae or mycorrhizas, a.k.a. endomycorrhiza, AM fungi, or AMF) is a type of mycorrhiza in which the fungus penetrates the cortical cells of the roots of a vascular plant.
Arbonne (Basque: Arbona) is a French commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region of southwestern France.
The Arbëreshë or Italo-Albanians are an ethnic and linguistic Albanian minority community living in southern Italy, mostly concentrated in scattered villages in the region of Calabria, but also with a few minor settlements in the regions of Apulia, Basilicata, Molise, and Sicily.
Arbroath or Aberbrothock /ɑːrˈbroʊθ/ (Scottish Gaelic: Obar Bhrothaig, [opəɾˈvɾo.ɪkʲ]) is a former royal burgh and the largest town in the council area of Angus in Scotland, and has a population of 23,902. It lies on the North Sea coast, around 16 miles (25.7 km) ENE of Dundee and 45 miles (72.4 km) SSW of Aberdeen.
Arboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them.
Arbovirus is a term used to refer to any viruses that is transmitted by arthropod vectors. The word arbovirus is an acronym (ARthropod-BOrne virus).