It is important for people to remember that, when looking at the periodic table of the elements, ânaturally occurringâ does not necessarily mean âabundant.â Many naturally occurring elements are in fact quite rare, although some were once more abundant.
future. 1  time that is to be or come hereafter. 2  something that will exist or happen in time to come: The future is rooted in the past. 3  a condition, especially of success or failure, to come: Some people believe a gypsy can tell you your future. 4  Grammar. the future tense. 5  Usually, futures.
Sign is a general word for whatever gives evidence of an eventâpast, present, or future: Dark clouds are a sign of rain or snow. An omen is an augury or warning of things to come; it is used only of the future, in general, as good or bad: birds of evil omen.