(lông, long) adjective
1. Having relatively great linear extension; not short: opposed to short, and distinguished from broad and wide.
2. Having relatively great extension in time; lasting.
3. Extended either in space or time to a specified degree: an hour long, a foot long.
4. Continued in a series to a great extent: a long list of grievances.
5. Delayed unexpectedly or unduly; dilatory.
6. Far–reaching; extending far in prospect or into the future; far away in time.
7. Holding for a rise, as stocks.
8. Denoting measure, weight, quantity, etc., in excess of a standard: a long five minutes.
9. Phonet. a Relatively more prolonged in sound: The sound (ē) is longer in seed than in seat, b Conventionally, indicating the sounds of a, e, i, o, u as they are pronounced in mate, scene, nice, dote, fuse (in diacritical systems, often written with a macron), as opposed to the “short” sounds of bat, fed, pit, rot, cup: in the early Old English period, each of these letters indicated a long or a short vowel sound of similar quality but different duration; this distinction no longer exists and the designation is now an arbitrary one.
10. In classical prosody, requiring relatively more time to pronounce: said of syllables containing a long vowel (eta, omega, etc.), a diphthong, or a vowel followed by two consonants or a double consonant.
11. In English prosody, accented.
—noun
1. The whole extent of a thing; something that is characterized by length: used elliptically.
2. In medieval music, a note equal to four or sometimes six whole notes.
3. A long syllable.
4. plural Those who have purchased securities or commodities and are holding them for an advance in price: opposed to shorts.
—the long and the short The whole; the entire sum and substance.
—adverb
1. To or at a great extent or period.
2. For a length of time.
3. Through the whole extent or duration.
4. At a point of duration far distant: long before or after.
—as (or so) long as Under condition that; since.
—before long Soon.
—for long For a long time.
—so long Colloq. Good–by. [OE lang, long]
Long, meaning “for a long time,” may appear as a combining form in hyphemes:

(lông, long) v.i
To have a strong or yearning desire; wish earnestly. [OE langian grow long]

(lông, long) v.i. Obs.
1. To be fitting or proper.
2. To belong. [Aphetic form of OE gelang dependent on]

(lông, long), Crawford Williamson,
1815–78, U.S. surgeon; pioneer in use of ether anesthesia in surgery.
—Huey,
1893–1935, U.S. lawyer and politician.