Meryl \m(e)-ryl, mer-yl\ as a girl's name (also used as boy's name Meryl), is pronounced MARE-el. It is of English origin, and the meaning of Meryl is "shining sea". Variant of Muriel via Meriel. Also possibly an invented name at the beginning of the 20th century, modeled on Cheryl. Well-known today due to actress Meryl Streep.
For more information, see also the related name Merle.