Is there any other definition of $\omega$ other than complex cube root of unity?

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As far as I have learnt at the school level the meaning of $\omega$ is the complex cube root of unity that is ($\omega$)³=1, i.e. ($\omega$-1)[($\omega$)²+$\omega$+1]=0. But are there any other definitions of $\omega$ possible in mathematics? Please help me out.

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The question is not clear. If you are asking whether there is any way to express a cube root of unity other than as a solution of $x^3=1$, then here are a couple: $e^{2\pi i/3}$, and $-(1/2)+i\sqrt3/2$, where $i$ is a square root of minus one.

If you are asking whether the symbol $\omega$ is ever used to mean something other than a cube root of unity, then several answers have been given in the comments. Another one comes from Number Theory, where $\omega(n)$ is used for the number of distinct prime divisors of $n$. For example, $\omega(72)=2$, since there are exactly two different primes dividing $72$, namely, $2$ and $3$. See https://en.wikipedia.org/wiki/Prime_omega_function