Mentioned something indirectly or hinted at it without stating it directly.
From Latin 'alludere,' combining 'ad' (to) and 'ludere' (to play). The sense evolved from 'to play with' to 'to playfully refer to' and finally to 'to mention indirectly.'
The Latin root 'ludere' (to play) survived in English in words like 'ludicrous'—so when you allude to something, you're essentially 'playing at' mentioning it rather than stating it outright!
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