is this term universally defined?
No, it is not.
Evil
A fundamental question is whether there is a universal, transcendent definition of evil, or whether evil is determined by one's social or cultural background. C. S. Lewis, in "The Abolition of Man", maintained that there are certain acts that are universally considered evil, such as rape and murder. The numerous instances in which rape or murder is morally affected by social context call this into question. Up until the mid-19th century, the United States—along with many other countries—practiced forms of slavery. As is often the case, those transgressing moral boundaries stood to profit from that exercise. 
where is the garden of earthly delights displayed Museo del Prado what is this garden? The Garden of Earthly Delights is the modern title given to a triptych oil painting on oak panel painted by the Early Netherlandish master Hieronymus Bosch, between 1490 and 1510, when Bosch was between 40 and 60 years old. how has it been interpreted? Individual motifs and elements of symbolism may be explained, but so far relating these to each other and to his work as a whole has remained elusive. The enigmatic scenes depicted on the panels of the inner triptych of "The Garden of Earthly Delights" have been studied by many scholars, who have often arrived at contradictory interpretations. is it divided into multiple panels? Yes, the left center and right panels. what does the left one show? The left panel, sometimes known as the "Joining of Adam and Eve” depicts a scene from the paradise of the Garden of Eden commonly interpreted as the moment when God presents Eve to Adam. and the center? The center image depicts the expansive "garden" landscape which gives the triptych its name. what about the one on the right? The right panel depicts a world in which humans have succumbed to temptations that lead to evil and reap eternal damnation. where from do the former term originate? The modern English word "evil" and its cognates such as the German and Dutch are widely considered to come from a Proto-Germanic reconstructed form of "*ubilaz”. how do the christians see it? Christian theology draws its concept of evil from the Old and New Testaments. The Christian Bible exercises "the dominant influence upon ideas about God and evil in the Western world.
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Evil [SEP] Question of a universal definition
A fundamental question is whether there is a universal, transcendent definition of evil, or whether evil is determined by one's social or cultural background. C. S. Lewis, in "The Abolition of Man", maintained that there are certain acts that are universally considered evil, such as rape and murder. The numerous instances in which rape or murder is morally affected by social context call this into question. Up until the mid-19th century, the United States—along with many other countries—practiced forms of slavery. As is often the case, those transgressing moral boundaries stood to profit from that exercise. Arguably, slavery has always been the same and objectively evil, but men with a motivation to transgress will justify that action.