the momentary present; "Now is a good time to do it"; "it worked up to right now"
used to preface a command or reproof or request; "now hear this!"; "now pay attention"
at the present moment; "goods now on sale"; "the now-aging dictator"; "they are now abroad"; "he is busy at present writing a new novel"; "it could happen any time now"
in the historical present; at this point in the narration of a series of past events; "President Kennedy now calls in the National Guard"; "Washington now decides to cross the Delaware"; "the ship is now listing to port"
in the immediate past; "told me just now"
(prefatory or transitional) indicates a change of subject or activity; "Now the next problem is..."
occurring in the same period of time; "a rise in interest rates is often contemporaneous with an increase in inflation"; "the composer Salieri was contemporary with Mozart"
having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
a period of indeterminate length (usually short) marked by some action or condition; "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather"
a time period usually extending from Friday night through Sunday; more loosely defined as any period of successive days including one and only one Sunday