What is the meaning of Eid?

Alternative letter-case form of Eid.

An isthmus or narrow neck of land jutting out into the sea; a sandbank cast up by the sea across the head of an open bight or inlet and having a lagoon inside it.

an isthmus

past participle of eie

form removed with the spelling reform of 2005; superseded by ed

an oath

an expletive

an isthmus

alternative form of id (“Eid”)

oath

alternative form of ide

impersonal imperfect/conditional of mynd

Source: wiktionary.org