What is the definition of a shakespearean sonnet?

A Shakespearean sonnet is a 14-line poem written in iambic pentameter, with a specific rhyme scheme and structure. The rhyme scheme is ABAB CDCD EFEF GG. The structure is typically divided into four quatrains (four-line stanzas) and a final rhyming couplet (two-line stanza). Shakespearean sonnets often explore themes of love, loss, beauty, nature, and mortality.