From Glover's solmization, from Middle English sol, Italian sol in the solmization of Guido of Arezzo, from the first syllable of Latin solve in the lyrics of the scale-ascending hymn Ut queant laxis by Paulus Deacon.

• (RP) IPA: /sɒl/, /səʊl/
• (America) enPR: sōl, IPA: /sɔl/, /sɑl/, /soʊl/

sol (uncountable)

1. (music)
   1. In a movable-do or tonic sol-fa system: the fifth step in a scale, preceded by fa and followed by la.
      • c. 1590–1592 (date written), William Shakespeare, “The Taming of the Shrew”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC ↗, [Act III, scene i], page 218 ↗, column 2:

        D ſol re, one Cliffe, two notes haue I, / Ela mi, ſhow pitty or I die.

      • [c. 1591–1595 (date written), [William Shakespeare], […] Romeo and Juliet. […] (First Quarto), London: […] Iohn Danter, published 1597, →OCLC ↗, [Act IV, scene v] ↗:

        Ser[vant, i.e., Peter]. Alack alack what ſhal I doe, come Fidlers play me ſome mery dumpe. / I. [First musician]. A ſir, this is no time to play. / […] / Ser. Then will I giue it you, and ſoundly to. / I. What will you giue vs? / Ser. The fidler, Ile re you, Ile fa you, Ile ſol you. / I. If you re vs and fa vs, we will note you.

        A nonce use as a verb.]

   2. In a fixed-do system: the musical note G.

• French: sol
• Portuguese: sol
• Russian: соль
• Spanish: sol

From Old French sol (modern French sou), from Latin solidum, the accusative singular of solidus ("Roman gold coin; (adjective) solid"), ultimately from Proto-Indo-European *solh₂-.

• (RP) IPA: /sɒl/
• (America) IPA: /sɔl/, /sɑl/

sol (plural sols)

1. (historical) An old coin from France and some other countries worth 12 deniers.
   • 1605 (first performance), Beniamin Ionson [i.e., Ben Jonson], “Volpone, or The Foxe. A Comœdie. […]”, in The Workes of Beniamin Ionson (First Folio), London: […] Will[iam] Stansby, published 1616, →OCLC ↗, Act IV, scene v, pages 502–503 ↗:

     This fellow, For ſix ſols more, would pleade againſt his Maker.

   • 1611, Thomas Coryate [i.e., Thomas Coryat], “My Obseruations of the Most Glorious, Peerelesse, and Mayden Citie of Venice: […]”, in Coryats Crudities Hastily Gobled Vp in Five Moneths Trauells […], London: […] W[illiam] S[tansby for the author], →OCLC ↗, page 285 ↗, lines 18–24:

     Moſt of their owne coines that I ſaw were theſe. In gold but one, which is their chiquiney: This piece doth much vary in the value. For ſometimes it is high, ſometimes low. When I was there, a chiquiney was worth eleuen liuers, and twelue ſols. Which counteruaileth eight ſhillings and eight pence halfe penny of our money.

   • 1748, [Tobias Smollett], chapter XLIV, in The Adventures of Roderick Random. […], volume II, London: […] [William Strahan] for J[ohn] Osborn […], →OCLC ↗, page 69 ↗:

     It was the fate of the grenadier company, to which I now belonged, to lie at Rheims, where I found myſelf in the utmoſt want of every thing: My pay, which amounted to five ſols a day, far from ſupplying me with neceſſaries; being ſcarce ſufficient to procure a wretched ſubſiſtance, to keep ſoul and body together; […]

• solid
• solidus

From Spanish sol, from Latin sol, ultimately from Proto-Indo-European *sóh₂wl̥.

• (RP) IPA: /sɒl/
• (America) IPA: /sɔl/, /sɑl/

sol

1. (historical) A former Spanish-American silver coin.
2. In full nuevo sol or new sol: the main currency unit of Peru which replaced the inti in 1991; also, a coin of this value.

• Sun, sun

From Latin sol; see further at etymology 3.

• (RP) IPA: /sɒl/
• (America) IPA: /sɔl/, /sɑl/

sol (plural sols)

1. (astronomy) A solar day on the planet Mars (equivalent to 24 hours, 39 minutes, 35 seconds).

• Sol
• Sun, sun

• Russian: марсиа́нские су́тки

Sense 1 (“type of colloid”) is derived from -sol (in words like alcosol and hydrosol), an abbreviation of solution.

Sense 2 (“solution to an objection”) is derived directly from solution.

• (RP) IPA: /sɒl/
• (America) IPA: /sɔl/, /sɑl/

sol (plural sols)

1. (physical chemistry) A type of colloid in which a solid is dispersed in a liquid.
2. (obsolete) A solution to an objection (or "ob"), for example, in controversial divinity.
   • 1624, Democritus Junior [pseudonym; Robert Burton], “Symptomes Generall, Loue to Their Owne Sect, Hate of All Other Religions, […]”, in The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: […] John Lichfield and James Short, for Henry Cripps, →OCLC ↗, partition 3, section 4, member 1, subsection 3, page 524 ↗:

     [F]or that they had nothing elſe to doe, […] haue coyned a thouſand idle queſtions, nice diſtinctions, Obs and Sols, […]

   • [1677 (indicated as 1678), [Samuel Butler], “[The Third Part of Hudibras]. Canto II.”, in Hudibras. The Third and Last Part. […], London: […] Robert Horne, […], published 1679, →OCLC ↗; republished in A[lfred] R[ayney] Waller, editor, Hudibras: Written in the Time of the Late Wars, Cambridge, Cambridgeshire: University Press, 1905, →OCLC ↗, page 165 ↗:

     Where Hinderſon, and th' other Maſſes / Were ſent to Cap Texts, and Put Caſes: / To paſs for deep, and Learned Scholars, / Although but Paltry, Ob-and-Sollers: […]]

• French: sol
• German: Sol
• Portuguese: sol
• Russian: золь
• Spanish: sol

• (British) IPA: /sɒl/
• (America) IPA: /soʊl/

Borrowed from Latin Sōl.

1. (poetic, scifi) The Sun, the star orbited by the Earth.
2. (Roman god) The sun god; equivalent of the Greek Helios. Brother of Luna and Aurora.
3. (Norse mythology) The sun goddess.
4. (nonce word) A male given name

• (Earth's star) sun, Sun
• ☉, ☼

sol (uncountable)

1. (tincture, rare) Or gold, in the postmedieval practice of blazoning the tinctures of certain sovereigns' (especially British monarchs') coats as planets.
   • 1693, Richard Blome, The Art of Heraldry, in two parts ... second edition ..., pages 76-77:

     4. Luna, a Mantle of Estate, Mars doubled Ermine, ouched Sol, garnished with Strings fastned thereunto fretways dependent, and tasselled of the same. [...] These Arms do belong to the Town of Beckbock in Wales. 5. Jupiter, a Mace of Majestry in Bend Sol.

2. (obsolete, alchemy, chemistry) Gold.

Shortening.

1. A male given name.
   • 1846 October 1 – 1848 April 1, Charles Dickens, Dombey and Son, London: Bradbury and Evans, […], published 1848, →OCLC ↗:

     “Chock full o’ science,” said the radiant Captain, “as ever he was! Sol Gills, Sol Gills, what have you been up to, for this many a long day, my ould boy?”

1. (sports) Abbreviation of Solomon Islands

sol (plural sols)

1. Initialism of statute of limitations
2. Initialism of speed of light
3. Initialism of standards of learning
4. Initialism of sleep onset latency
5. Space-occupying lesion of the brain can be caused by different pathology such as a malignancy, an abscess or a haematoma
6. (in the plural) Init of stoppages of leave

sol (not comparable)

1. Initialism of shit out of luck