WordWeb Online

1. For the most time
   "she stayed longest"

1. Primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified
   "a long life"; "a long boring speech"; "a long time"; "a long friendship"; "a long game"; "long ago"; "an hour long"
    
2. Primarily spatial sense; of relatively great or greater than average spatial extension or extension as specified
   "a long road"; "a long distance"; "contained many long words"; "ten miles long"
    
3. Good at remembering
   "a long mind";
   - retentive, recollective, tenacious
    
4. (finance) holding securities or commodities in expectation of a rise in prices
   "is long on coffee"; "a long position in gold"
    
5. (of speech sounds or syllables) of relatively long duration
   "the English vowel sounds in 'bate', 'beat', 'bite', 'boat', 'boot' are long"
    
6. Of relatively great height
   "a race of long gaunt men"; "looked out the long French windows"
    
7. Involving substantial risk
   "long odds"
    
8. Planning prudently for the future
   "took a long view of the geopolitical issues"; "large goals that required long-sighted policies";
   - farseeing, farsighted, foresighted, foresightful, prospicient, long-sighted [Brit]
    
9. Having or being more than normal or necessary
   "long on brains"; "in long supply"

See also: abundant, agelong, all-night, aware, bimestrial, chronic, continuing, daylong, drawn-out, durable, duration, eight-day, elongate, elongated, endless, eternal, extendable, extended, extendible, far, hourlong, interminable, lank, lasting, length, lengthened, lengthy, lifelong, long ass [N. Amer, informal], long-acting, long-dated [Brit], long-drawn-out, long-handled, longish, longitudinal, long-lasting, long-life, long-lived, long-range, long-run, long-snouted, longstanding, long-standing, long-staple, long-term, long-wool, long-wooled, mindful, monthlong, nightlong, oblong, overnight, perennial, pole-handled, polysyllabic, prolonged, protracted, provident, semipermanent, sesquipedalian, seven-day, stretch, tall, time-consuming, unending, unsound, weeklong, womb-to-tomb, yearlong

Antonym: short

Encyclopedia: Longest, John