Y

1. Y, the twenty-fifth letter of the English alphabet, at the beginning of a word or syllable, except when a prefix (see Y-), is usually a fricative vocal consonant; as a prefix, and usually in the middle or at the end of a syllable, it is a vowel. See Guide to Pronunciation, // 145, 178-9, 272.
2. n. Something shaped like the letter Y; a forked piece resembling in form the letter Y.
3. n. One of the forked holders for supporting the telescope of a leveling instrument, or the axis of a theodolite; a wye.
4. n. A forked or bifurcated pipe fitting.
5. n. A portion of track consisting of two diverging tracks connected by a cross track.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.