Significant time has passed or many things have changed.
काफी समय बीत चुका है या कई चीजें बदल चुकी हैं।
English Usage: A lot of water has flowed under the bridge since we last met.
Hindi Usage: जब से हम आखिरी बार मिले थे, बहुत समय बीता है।
bahut samay bita, bahut samay beeta, bahut samay beetaa, bahut samaay bita, bahut samay bitaa, bahut samay bita hai, bahut samay ho gaya
