Determinator, an alternative way of saying determiner, is defined as a person who makes a final decision.

How do you spell determinator?

or de·ter·mi·na·ter.

What is a determiner dictionary?

determiner. / (dɪˈtɜːmɪnə) / noun. a word, such as a number, article, possessive adjective, etc, that determines (limits) the meaning of a noun phrase, e.g. their in `their black cat' a person or thing that determines.