An archaic or dialectal expression meaning 'all day' or 'throughout the day,' used in Middle English and some regional dialects.
From Middle English al day, composed of 'al' (all) + 'day.' This represents an older form before 'all day' became standard as two separate words in modern English.
Medieval people would say 'I worked alday' just like we say 'I worked all day'—it's fascinating how the same idea gets split into separate words as language evolves!
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