Measuring a great distance from end to end. Lasting or taking a great amount of time. Relatively great in extent. (of a vowel) categorized as long with regard to quality and length (e.g., in standard American English, the vowel / uː / in food is long, as distinct from the short vowel / ʊ / in good ). (of odds or a chance) reflecting or representing a low level of probability. (of shares, bonds, or other assets) bought in advance, with the expectation of a rise in price. Well-supplied with. For a long time. (with reference to the ball in sports) at, to, or over a great distance, or further than expected or intended. Have a strong wish or desire. A long interval or period. A long sound such as a long signal in Morse code or a long vowel or syllable. Long-dated securities, especially gilt-edged securities. Longitude.