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milestone

mile·stone

milestone

 
 
pronunciation:
maIl ston
part of speech: noun
definition 1: a stone or mark that shows the distance in miles to a specific place.
The milestone showed the bicyclists how far they had gone.
definition 2: an important event or turning point in history or in a person's life.
The discovery of electricity was a milestone in the history of science.
similar words:
landmark