Si Definition
si
noun
- a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
- a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the United States is the only country in the world not totally committed to the Systeme International d'Unites"
- the syllable naming the seventh (subtonic) note of any musical scale in solmization
"Si" in song lyrics
See how si is used in real songs:
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"I be the T dot double, straight from the South si'"
Cl'Che f/ Billy Cook, T2 — On Top of Da World -
"to the whole S.I."
Digable Planets — 9th Wonder -
"Been up top for a while, now I'm back on S.I."
Fes Taylor f/ L.I.S., Lon Dini, Lot-a-Nerv, Pa Bazil, Sense — Trouble
Words that rhyme with si
Usage tips for "si"
Understanding the precise definition of a word helps you use it with confidence. When using "si" in your writing, consider whether you need the word itself or one of its synonyms — subtle differences in meaning can change the tone of a sentence. If you're writing poetry or song lyrics, check the rhymes for si to find words that pair well.