loop is an English word and means "rim", "link", "circuit" or "sequence" in the Portuguese translation. Depending on the context, the loop can mean different actions related to repetition.
One infinite loop it is the same as an “infinite repetition”. In the area of information technology and programming softwares, for example, can represent an error in the execution of a certain program, when it starts to follow the same sequence of instructions repeatedly.
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In the musical field, it's called loop an excerpt of the song that is repeated.
O looping corresponds to the act of doing loops, like the movements that airplane pilots make when tracing circular routes in a vertical plane, for example.
From a figurative sense, the word loop it can still mean the condition of incomprehension about something, that is, when the person reviews all the steps, tips and instructions about a certain thing, but still doesn't understand its essence or nature.
See also: meaning of infinity symbol.