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Noun hour has 4 senses
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 work time; time unit, unit of time; work time; time unit, unit of time
 --1 is a part of day, twenty-four hours, solar day, mean solar day
 --1 has parts: 
--1 has particulars:
 |  | shift, work shift, duty period; 2 of 4 senses of hour                                                   ; hour, hr, 60 minutes; sidereal hour; man hour, person hour; hours; shift, work shift, duty period; 2 of 4 senses of hour                                                   ; hour, hr, 60 minutes; sidereal hour; man hour, person hour | 
hour, time of day - clock time; "the hour is getting late"--2 is a kind of time period, period of time, period; clock time, time; time period, period of time, period; 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; hour, time of day; 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 | 
hour - a special and memorable period; "it was their finest hour"--3 is a kind of time period, period of time, period; time period, period of time, period
 
 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; distance
 
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