What is a Soliloquy?

From Google:

so·lil·o·quy

səˈliləkwē/

noun

noun: soliloquy; plural noun: soliloquies

1. 1.

   an act of speaking one's thoughts aloud when by oneself or regardless of any hearers, esp. by a character in a play.

   synonyms:

   monologue, speech, address, lecture, oration, sermon, homily, aside More

   • a part of a play involving a soliloquy.

     
     

Origin

Middle English: from late Latin soliloquium, from Latin solus ‘alone’ + loqui ‘speak.’

FYI -

The Chronology of Shakespeare's Plays

First Performed	Plays	First Printed
1590-91	Henry VI, Part II	1594?
1590-91	Henry VI, Part III	1594?
1591-92	Henry VI, Part I	1623
1592-93	Richard III	1597
1592-93	Comedy of Errors	1623
1593-94	Titus Andronicus	1594
1593-94	Taming of the Shrew	1623
1594-95	Two Gentlemen of Verona	1623
1594-95	Love's Labour's Lost	1598?
1594-95	Romeo and Juliet	1597
1595-96	Richard II	1597
1595-96	A Midsummer Night's Dream	1600
1596-97	King John	1623
1596-97	The Merchant of Venice	1600
1597-98	Henry IV, Part I	1598
1597-98	Henry IV, Part II	1600
1598-99	Much Ado About Nothing	1600
1598-99	Henry V	1600
1599-1600	Julius Caesar	1623
1599-1600	As You Like It	1623
1599-1600	Twelfth Night	1623
1600-01	Hamlet	1603
1600-01	The Merry Wives of Windsor	1602
1601-02	Troilus and Cressida	1609
1602-03	All's Well That Ends Well	1623
1604-05	Measure for Measure	1623
1604-05	Othello	1622
1605-06	King Lear	1608
1605-06	Macbeth	1623
1606-07	Antony and Cleopatra	1623
1607-08	Coriolanus	1623
1607-08	Timon of Athens	1623
1608-09	Pericles	1609
1609-10	Cymbeline	1623
1610-11	The Winter's Tale	1623
1611-12	The Tempest	1623
1612-13	Henry VIII	1623
1612-13	The Two Noble Kinsmen*	1634