A feat is defined as any heroic action or action worthy of being recognized and admired. For an act to be considered a feat, it must have a series of characteristics that make it transcend in time, sometimes receiving international notoriety.
A clear example of this would be, "The local soccer team qualified for the World Cup, beating their rival 5 to 1, a feat never achieved before." A feat can take place in any field, although in sports this type of action is usually very common. For example, if the Cuban team defeats the Brazilian team, this can be taken as a feat, given that it is an unexpected result from both sides.
In the world of tennis, it could also be considered a feat if a player who is in the last position of the ranking defeats the world number four, since the chances of victory were practically nil. So you have that the feat is related to the unexpected.
In the field of science, there are also feats and it is related when scientists manage to make possible something that until then was impossible. It is very common in the surgical interventions that today are normal were considered, a few decades ago, as great feats. However today some discoveries in medicine are considered as unpublished.
It is important to note that a feat sometimes tends to be subjective, since for one person one of these actions can lead to a great feat while for others it may be something of little importance. The Guinness book of records is the one who records all kinds of extraordinary achievements made by human beings.
