Noun hour has 4 senses
  1. hour, hr, 60 minutes - a period of time equal to 1/24th of a day; "the job will take more than an hour"
    --1 is a kind of time unit, unit of time
    --1 is a part of day, twenty-four hours, solar day, mean solar day
    --1 has parts:
     half-hour, 30 minutes; quarter-hour, 15 minutes; minute, min; quarter
    --1 has particulars: sidereal hour; man hour, person hour
  2. hour, time of day - clock time; "the hour is getting late"
    --2 is a kind of clock time, time
    --2 has particulars:
     noon, twelve noon, high noon, midday, noonday, noontide; mealtime; late-night hour; midnight; small hours; bedtime; closing time; dawn, dawning, morning, aurora, first light, daybreak, break of day, break of the day, dayspring, sunrise, sunup, cockcrow; early-morning hour; sunset, sundown; twilight, dusk, gloaming, nightfall, evenfall, fall, crepuscule, crepuscle; none; happy hour; rush hour; zero hour; canonical hour
  3. hour - a special and memorable period; "it was their finest hour"
    --3 is a kind of
    time period, period of time, period
  4. hour, minute - distance measured by the time taken to cover it; "we live an hour from the airport"; "its just 10 minutes away"
    --4 is a kind of distance