past

As a verb past

is .

As a noun antitelephone is

(physics) a hypothetical device, used in thought experiments on causality, that could be used to send signals into one's own past.

As a verb past

is .

As a noun archaeomagnetism is

(geology|physics).

As a verb past

is .

As a noun paleorecord is

any record from the distant past, but especially a fossil record.

As a verb past

is .

As an adjective forby is

uncommon; out of the ordinary; extraordinary; superior.

As an adverb forby is

past; by; beyond.

As a preposition forby is

beyond; past; more than; greater than; over and above; moreover.

As a verb past

is .

As a noun retrodiction is

a form of "prediction" that deals with the past rather than the future, sometimes useful in testing theories whose actual predictions are too long-term to be of immediate use.

As nouns the difference between past and eternalism

is that past is the period of time that has already happened, in contrast to the present and the future while eternalism is the view that time resembles space and thus past and future events are in some sense coexistent.

As an adjective past

is having already happened; in the past; finished.

As an adverb past

is in a direction that passes.

As a preposition past

is beyond in place, quantity or time.

As verbs the difference between past and backcast

is that past is while backcast is to identify the actions required in order to reach a proposed future.

As a noun backcast is

a cast or throw back.

As an adjective backcast is

retrospective.

As an adverb backcast is

long ago; in the past.

As nouns the difference between past and pastness

is that past is the period of time that has already happened, in contrast to the present and the future while pastness is the state or quality of being past.

As an adjective past

is having already happened; in the past; finished.

As an adverb past

is in a direction that passes.

As a preposition past

is beyond in place, quantity or time.

As a verb past

is .

As an adjective intertemporal is

describing any relationship between past, present and future events or conditions.