What is if; -- a word used by old English authors. Shak. Nay, an thou dalliest, then I am thy foe. B. Jonson. An if, and if; if called?

an — If; -- a word used by old English authors. Shak. Nay, an thou dalliest, then I am thy foe. B. Jonson. An if, and if; if. (Webster's 1913.)

Sources