3f82090d_s_Guide_to_Philosophical_Terms__WHAT_IT_MEANS_TO_A_PHILOSOPHER
[TERM] possible world [WHAT IT MEANS TO A LAYMAN] a phrase which I seem to recall was used as a lyric in a recent animated movie from the Walt Disney studios
either the biggest spatio-temporally connected thing of which we are all part, in which case there is only one; or some sort of weird abstraction, in which case there are uncountably many; but for a different view see Lewis
A Non-Philosopher's Guide to Philosophical Terms
WHAT IT MEANS TO A PHILOSOPHER