Defined by merriam-webster.com/dictionary as
adjective, often capitalised ba·roque | \ bə-ˈrōk , ba-, -ˈräk, -ˈrȯk\
1 art : of, relating to, or having the characteristics of a style of artistic expression prevalent especially in the 17th century that is marked generally by use of complex forms, bold ornamentation, and the juxtaposition of contrasting elements often conveying a sense of drama, movement, and tension.
2 : characterised by grotesqueness, extravagance, complexity, or flamboyance
Baroque music is a period or style of Western art music composed from about 1600 to 1750. This era follows the era of Renaissance music, and then the Classical period. Baroque music is a major part of canon "classical music", and is currently being studied, performed and widely heard. The main composers of the Baroque period include Bach Sebastian, Antonio Vivaldi, Claudio Monteverdi, Arcangelo Corelli and Johann Pachelbel. The Baroque period witnessed the creation of conventional tones, an approach to writing music in which a song or work was written with a specific key; This arrangement has continued to be used in most popular Western music. During the Baroque period, professional musicians were expected to become improvised artists of both solo and accompaniment lines. Baroque concerts are often accompanied by a basso continuo group (including harp-playing chord instruments and improvisation players from chords with a shaped bass) while a bassist group plays violin, cello, double bass Baroque music may have started simple but has evolved into a surprisingly complex style in 1750; The word "baroque" even today is used to describe anything that is highly decorated, complicated, labyrinth and confusing. In music, style has been expressed by Bach's music, with many melodious melodic lines, many melodious music lines running at the same time, many decorations, etc.
The classic style that replaces it in music emphasises simplicity and grace: a unique melodic music with accompaniment, instead of a few lines of melody running simultaneously. It emphasises sophistication, polite behaviour, loveliness, can be witty and funny, and requires emotions to be expressed subtly and beautifully. Its biggest model is Mozart. The "classic" clothing fashion of the time was said to be based on the clothes of the ancient world, with women wearing simple white dresses looking vaguely similar to what ancient Greek women wore, etc.
Over time, the classic style has grown beyond its peak into something very decorative and artificial, and caught up in the Romantic movement, in its "basic back" philosophy of All about honesty, express what you really feel and return to nature instead of writing to the court. An artist performing the baroque work before they started playing the work was to understand the emotion described by the work, but did not know the original purpose of losing the performance of realism that the composer had imagine, similar to how theatre performers for a playwright or opera will convey feelings of emotion in their performances.
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https://www.merriam-webster.com/dictionary/baroque
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Vivaldi, A. (2013, February 23). Vivaldi, Antonio L. (1678-1741) violin concerto for 2 violins in A minor opus 3 no. 8, RV 522. Retrieved from https://youtu.be/pL37dgznKoM