FRONT (5)

Front (?), n. 1. 1. (Fort.) All the works along one side of the polygon inclosing the site which is fortified.
2. 2. (Phon.) The middle of the upper part of the tongue, — the part of the tongue which is more or less raised toward the palate in the pronunciation of certain sounds, as the vowel i in machine, e in bed, and consonant y in you. See Guide to Pronunciation, §10.
3. 3. The call boy whose turn it is to answer the call, which is often the word “front,” used as an exclamation.