Question

what is meant by non terminating decimal

Answer 1

A non-terminating, non-repeatingdecimal is a decimal number that continues endlessly, with no group of digits repeating endlessly. Decimals of this type cannot be represented as fractions, and as a result are irrational numbers. Examples. Pi is a non-terminating, non-repeating decimal.

Answer 2

The decimal which doesn't terminates or ends and has also no pattern then it is called non terminating decimal for example:
0.1121231234123451234561234567......