From patriot + -ism.

• (British) IPA: /ˈpætɹi.əˌtɪzəm/
• (America) IPA: /ˈpeɪtɹi.əˌtɪzəm/

patriotism

1. Love of one's country; devotion to the welfare of one's compatriots; passion which inspires one to serve one's country.
   • 1776, Edward Gibbon, The History of the Decline and Fall of the Roman Empire, Vol I, ch 1-pt ii:

     That public virtue, which among the ancients was denominated patriotism, is derived from a strong sense of our own interest in the preservation and prosperity of the free government of which we are members.

   • 1837, L[etitia] E[lizabeth] L[andon], “A First Night”, in Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], →OCLC ↗, page 69 ↗:

     The subject of his play was the fate of Agis, the young and heroic King of Sparta: it gave the ideal of patriotism, relieved by the tenderness of sorrow, and the fidelity of love.

   • 1941, George Orwell, The Lion and the Unicorn:

     Both Blimps and highbrows took for granted, as though it were a law of nature, the divorce between patriotism and intelligence. If you were a patriot you read Blackwood's Magazine and publicly thanked God that you were "not brainy". If you were an intellectual you sniggered at the Union Jack and regarded physical courage as barbarous. It is obvious that this preposterous convention cannot continue... Patriotism and intelligence will have to come together again.

2. The actions of a patriot
3. The desire to compete with other nations; nationalism.

• (love of country) nationalism
• (nationalism) jingoism, chauvinism, superpatriotism, ultranationalism

• French: patriotisme
• German: Patriotismus
• Portuguese: patriotismo
• Russian: патриоти́зм
• Spanish: patriotismo