There are 3 main definitions of si in English:

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si1

Syllabification: si

noun

Music
Another term for ti.

Origin

early 18th century: from the initial letters of Sancte Iohannes, the closing words of a Latin hymn (see solmization).

Words that rhyme with si

absentee, açai, addressee, adoptee, agree, allottee, amputee, appellee, appointee, appraisee, après-ski, assignee, asylee, attendee, bailee, bain-marie, Bangui, bargee, bawbee, be, Bea, bee, bootee, bouquet garni, bourgeoisie, Brie, BSc, buckshee, Capri, cc, chimpanzee, cohabitee, conferee, consignee, consultee, Cree, debauchee, decree, dedicatee, Dee, degree, deportee, dernier cri, detainee, devisee, devotee, divorcee, draftee, dree, Dundee, dungaree, eau-de-vie, emcee, employee, endorsee, en famille, ennui, enrollee, escapee, esprit, evacuee, examinee, expellee, fee, fiddle-de-dee, flea, flee, fleur-de-lis, foresee, franchisee, free, fusee (US fuzee), Gardaí, garnishee, gee, ghee, glee, goatee, grandee, Grand Prix, grantee, Guarani, guarantee, he, HMRC, indictee, inductee, internee, interviewee, invitee, jamboree, Jaycee, jeu d'esprit, key, knee, Lea, lee, legatee, Leigh, lessee, Ley, licensee, loanee, lychee, manatee, Manichee, maquis, Marie, marquee, me, Midi, mortgagee, MSc, nominee, obligee, Otomi, parolee, Parsee, parti pris, patentee, Pawnee, payee, pea, pee, permittee, plc, plea, pledgee, pollee, presentee, promisee, quay, ratatouille, referee, refugee, releasee, repartee, retiree, returnee, rupee, scot-free, scree, sea, secondee, see, settee, Shanxi, Shawnee, shchi, she, shea, sirree, ski, spree, standee, suttee, tant pis, tea, tee, tee-hee, Tennessee, testee, the, thee, three, thuggee, Tiree, Torquay, trainee, Tralee, transferee, tree, Trincomalee, trustee, tutee, twee, Twi, undersea, vestee, vis-à-vis, wagon-lit, Waikiki, warrantee, we, wee, whee, whoopee, ye, yippee, Zuider Zee

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There are 3 main definitions of si in English:

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Si2

Syllabification: Si

symbol

The chemical element silicon.

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There are 3 main definitions of si in English:

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SI3

Syllabification: SI

abbreviation

1The international system of units of measurement.
[from French Système International]

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