(verb)
broadly, to walk in a purposeful and determined manner;
e.g. He started to march towards them to ask why they were late.
(verb)
to steadily advance, proceed, or make progress, especially figuratively;
e.g. The days continued to march on as they waited for a response.
(verb)
to hold an organized protest about/against something, usually involving walking on public roads as a group;
e.g. The people gathered to march for their rights.
(noun)
the action of walking steadily and often rhythmically, the step/stride used when walking in this manner, or the distance covered by walking this way;
e.g. The men moved at a slow march from one side of the field to the other.
(noun)
the advance or progress of something, especially some abstract thing that figuratively moves forward without stopping;
e.g. We cannot stop the march of time.
(noun)
an organized assembly or procession held in order to protest against or spread awareness about something;
e.g. This weekend, there will be a march to protest against the new law.
(noun)
the third month in a year according to the Gregorian calendar (used as "March");
e.g. He is excited for March because that is when his birthday is.