Past
Part of speech: adverb
Definition: in a direction that passes
Part of speech: preposition
Definition: beyond in place, quantity or time
Part of speech: noun
Definition: The period of time that has already happened, in contrast to the present and the future. The past tense.
Part of speech: adjective
Definition: Having already happened; in the past; finished. Relating to the past. (of a period of time) the one before this one
Example sentence: The past cannot be changed. The future is yet in your power.
By
Part of speech: adverb
Definition: Along a path which runs by the speaker.
Part of speech: noun
Definition: A pass
Part of speech: adjective
Definition: Out of the way, subsidiary.
Part of speech: preposition
Definition: Near or next to.At some time before (the given time), or before the end of a given time interval.Through the action or presence of.(Indicates the creator of a work) Existing through the authorship etc of.(Indicates the cause of a condition or event) Through the action of, caused by, responsibility for; by dint of.(Indicates a means) Involving/using the means of.(Indicates a rule followed) Using the rules or logic of.(Indicates the amount of some progression) With a change of.(In the formulae X by X and by Xs, indicates a steady progression, one X after another.)(Indicates an oath) With the authority of.Used to separate dimensions when describing the size of something.
Part of speech: interjection
Definition: Goodbye.