| hour | | |
| n. (time) | 1. 60 minutes, hour, hr | a period of time equal to 1/24th of a day.; "the job will take more than an hour" |
| ~ time unit, unit of time | a unit for measuring time periods. |
| ~ 24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours | time for Earth to make a complete rotation on its axis.; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day" |
| ~ sidereal hour | 1/24 of a sidereal day. |
| ~ 30 minutes, half-hour | a half of an hour. |
| ~ 15 minutes, quarter-hour | a quarter of an hour. |
| ~ man hour, person hour | a time unit used in industry for measuring work. |
| ~ min, minute | a unit of time equal to 60 seconds or 1/60th of an hour.; "he ran a 4 minute mile" |
| ~ quarter | a unit of time equal to 15 minutes or a quarter of an hour.; "it's a quarter til 4"; "a quarter after 4 o'clock" |
| n. (time) | 2. hour, time of day | clock time.; "the hour is getting late" |
| ~ clock time, time | a reading of a point in time as given by a clock.; "do you know what time it is?"; "the time is 10 o'clock" |
| ~ high noon, midday, noon, noonday, noontide, twelve noon | the middle of the day. |
| ~ mealtime | the hour at which a meal is habitually or customarily eaten. |
| ~ late-night hour | the latter part of night. |
| ~ midnight | 12 o'clock at night; the middle of the night.; "young children should not be allowed to stay up until midnight" |
| ~ small hours | the hours just after midnight. |
| ~ bedtime | the time you go to bed. |
| ~ closing time | the regular time of day when an establishment closes to the public. |
| ~ aurora, break of day, break of the day, cockcrow, dawn, dawning, daybreak, dayspring, first light, sunrise, sunup, morning | the first light of day.; "we got up before dawn"; "they talked until morning" |
| ~ early-morning hour | an hour early in the morning. |
| ~ sundown, sunset | the time in the evening at which the sun begins to fall below the horizon. |
| ~ crepuscle, crepuscule, dusk, evenfall, gloam, gloaming, nightfall, twilight, fall | the time of day immediately following sunset.; "he loved the twilight"; "they finished before the fall of night" |
| ~ none | a canonical hour that is the ninth hour of the day counting from sunrise. |
| ~ happy hour | the time of day when a bar sells alcoholic drinks at a reduced price. |
| ~ rush hour | the times at the beginning and end of the working day when many people are traveling to or from work. |
| ~ zero hour | the time set for the start of an action or operation. |
| ~ canonical hour | (Roman Catholic Church) one of seven specified times for prayer. |
| n. (time) | 3. hour | a special and memorable period.; "it was their finest hour" |
| ~ period, period of time, time period | an amount of time.; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" |
| n. (attribute) | 4. hour, minute | distance measured by the time taken to cover it.; "we live an hour from the airport"; "its just 10 minutes away" |
| ~ distance | the property created by the space between two objects or points. |
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