Definitions from Wiktionary (one o'clock)

▸ noun:  (In both the 12-hour clock and the 24-hour clock) The start of the second hour of the day; 1:00 a.m. (01:00).
▸ noun:  (Only in the 12-hour clock) The start of the fourteenth hour of the day; 1:00 p.m. (13:00).
▸ noun:  (informal) A position ahead and slightly rightward (horizontal clock orientation) or almost directly above (vertical clock orientation) (from the location of the 1 mark on a clock face)
▸ noun:  (informal) A dandelion.


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