What is the meaning of по?

used to indicate movement over a surface or movement bound to certain limits (usually continuous or repeating in time), on, over, through, along

introducing the object of a targeted action or for an action related to certain state, on, over, for

in conjunction with countable nouns for price or quantity, expressing quantity, expressing distribution, by

expressing approximate time

used to describe attire, in, with ... on

used to indicate means, by, via, on

indicating an activity or its domain, of

according to, based on, by, of

used to indicate cause, by

used to indicate direction, along

used as a prefix to form comparative for adjectives and adverbs, more

used for nouns, verbs and other parts of speech to form a comparative, more

used before prepositions to form a comparative, more, further

after

on (movement along a surface)

by (distributive)

times

according to

wearing

in pursuit of, in order to acquire

along

on

after

by

[with dative]

1. used broadly to indicate action, typically involving movement, across a surface or across several things in a generally flat plane; across, on, along, down, up, all over, (all) around:

   used broadly to indicate action, typically involving movement, across a surface or across several things in a generally flat plane; across, on, along, down, up, all over, (all) around:

   used to indicate the object/field/topic that something applies to; for, on, about, in, of (or translated with an attributive noun followed by a noun)

   used to indicate accordance with, adherence to or judgement based on something; according to, from, by

   used to indicate the reason for something, typically undesired/undesirable (see usage notes on из-за (iz-za)); due to, on account of, out of, from, by

   used with time (usually times of day or days of the week) to indicate regular repetition; on, in (the), every (or translated with a plural noun)

   used with numbers when there is distribution among multiple objects or repetition across multiple instances in time (dative case is used with the numbers one, a thousand, a million, a billion, a trillion etc. and numbers ending in these words)

   [with accusative]

   1. used with numbers when there is distribution among multiple objects or repetition across multiple instances in time (inanimate accusative case is used with numbers other than one, a thousand, a million, a billion, a trillion etc. or numbers ending in these words)

      used with numbers when there is distribution among multiple objects or repetition across multiple instances in time (inanimate accusative case is used with numbers other than one, a thousand, a million, a billion, a trillion etc. or numbers ending in these words)

      Used to indicate something serving as the boundary of the extent of some action.

      [with prepositional]

      1. Used to indicate a temporal or spatial boundary; (immediately) after, upon, on

         Used to indicate a temporal or spatial boundary; (immediately) after, upon, on

         to the liking of

         [with prepositional or dative]

         1. used to indicate an object of rumination, yearning, mourning; over, for

            used to indicate an object of rumination, yearning, mourning; over, for

            half

            for [with accusative]

            over, through, across, in, on [with locative]

            by, with, through (using an intermediary or medium) [with locative]

            by, according to [with locative]

            after [with locative]

            during [with locative]

            in miscellaneous senses in various phrasal constructs [with locative]

            denoting distribution and succession; by, per, each, apiece

            this

            year

            leg, foot

            with locative case

            1. used to indicate a physical object on which an action is taking place, or to indicate a space in which something is taking place.

               used to indicate a physical object on which an action is taking place, or to indicate a space in which something is taking place.

               In the direction of.

               used to indicate a direct object upon which an action is performed.

               used to indicate someone or something that is being mourned over.

               after

               used to indicate the disappearance, irreparable damage, or death of someone or something.

               used to indicate a time-frame during which an action occurs.

               one after another

               used with a temporal noun to indicate the age of something

               through

               used to indicate the object with which an action is performed.

               used to indicate a justification by which one arrives at a conclusion.

               used with certain nouns to form parentheses.

               each

               for (a length of time)

               used to indicate distance traveled in a certain period of time.

               used to indicate the purpose of an action.

               used to indicate the reason for an action.

               with accusative case

               1. used with directional nouns to indicate direction

                  used with directional nouns to indicate direction

                  up to

                  used to indicate an object which is the target of an action

                  until

                  used to indicate an action done according to someone's wish or request.

                  used to indicate quantity.

                  used to indicate the price of something.

                  Source: wiktionary.org