p.m.
午後
解説 Definition
午後
Used after a clock time to show that it falls between noon and just before midnight in the twelve-hour system. It distinguishes afternoon and evening times from the corresponding morning times marked a.m.
覚え方のコツ Memory Tip
p.m. はラテン語 post meridiem「正午の後」の頭文字で、12時間制の正午から深夜直前までを示します。3 p.m.、at 5 p.m. のように時刻の数字の後に置きます。post を「後」の意味を持つ語として postwar「戦後」と結び付けると、a.m. が正午前、p.m. が正午後だと整理できます。正午は 12 p.m. です。
Expand p.m. as post meridiem, Latin for “after midday.” Connect post with familiar words such as postwar, meaning “after the war”; this helps you remember that p.m. marks times after noon. Put it after the number, as in 3 p.m. or 5:30 p.m. Contrast it with a.m., which covers times before noon. In the twelve-hour clock, noon is 12 p.m., while midnight is 12 a.m., though writing “noon” or “midnight” can prevent confusion.
例文
School ends at 3 p.m.
学校は午後3時に終わります。
I go home at 5 p.m.
私は午後5時に家へ帰ります。
p.m. の類義語・関連語
p.m. の語源・成り立ち Etymology
ラテン語で「正午のあと」を意味する post meridiem の頭文字を取った略語です。
The abbreviation p.m. comes from the Latin phrase post meridiem, literally “after midday.” Latin post means “after,” and meridiem is a form connected with meridies, “midday” or “noon.” English adopted the abbreviation for the twelve-hour system to distinguish afternoon and evening times from matching morning times. Lowercase letters with periods are traditional, but PM, pm, and other punctuation styles are also used according to editorial convention.
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