Ma'anar ƙamus na "lokacin sararin samaniya" yana nufin ra'ayin lokaci a cikin sararin samaniya ko kuma shekarun sararin samaniya, yawanci ana aunawa daga lokacin Babban Bang. Hanya ce ta yin nuni ga faɗuwar lokacin da ke cikin tarihi da juyin halitta na sararin samaniya, tun daga farkon lokacin sararin samaniya har zuwa yau da kuma bayansa. A fannin kimiyya, ana yawan bayyana lokacin sararin samaniya ta hanyar raka'a kamar shekaru, dakika, ko ma lokacin Planck, kuma yana taka muhimmiyar rawa a fagage da dama na ilmin taurari da ilmin taurari.