Definition of "RA"

RA

noun
plural RAs
1. (medicine) Initialism of rheumatoid arthritis.
2. (anatomy, medicine) Initialism of right atrium.
3. (military) Initialism of rear admiral, a rank in the Royal Navy.
4. Initialism of Royal Academician, a member of the Royal Academy.
5. Initialism of resident assistant, a trained student leader, within a college or university, who is given the responsibility of supervising students living in a residence hall.
6. Initialism of Restricted Area, an area that only authorized people can enter. See also Exclusion zone.
7. (aviation) Initialism of resolution advisory (a type of TCAS warning).
8. Initialism of rescue ambulance.
9. Initialism of research assistant
proper noun
1. Initialism of Royal Academy, the Royal Academy of Arts is an art institution based in London, England.
2. Initialism of Royal Artillery, a regiment in the British Army.
3. Initialism of Republic of Armenia.
4. Initialism of republican army, most often the Provisional IRA.
  Quotations
  Good old Austin [ Currie ] was quick to say we hadn't and it wasn't a vote for the RA [ Republican Army ] .
  2006, Andrew Higgins Wyndham, Re-imagining Ireland, page 122
  If he joins the RA he sees himself as a free man one day walking down the streets of New York.
  2011, Dermot Healy, A Goat's Song
  Aside from the RA inner core (of around 200 or so), AFA's periphery – not all of whom supported RA's Irish Republicanism – comprised students, anarchists, non-aligned anti-fascists, former hunt saboteurs, and even football casuals.
  2016, Nigel Copsey, Anti-Fascism in Britain, page 177
phrase
1. Initialism of rahmatu 'llahi alayh, that is Arabic رحمة الله عليه‎ (“God have mercy on him”), a eulogy used by Muslims in reference to honoured deceased.