Yes, such a person would be a virgin. (I feel compelled to add that ‘virginity’ applies
equally to males and females–of any age–definitely not just to “female maidens”!) A virgin–whatever his/her age or gender–is someone who has not engaged in sexual intercourse. It’s that simple.
As for “indecent viewing” and “masturbation”, the Church also includes them in sins against purity and/or chastity, and it really doesn’t seem relevant in this context whether or not the person engaging in these activities is a virgin. If
any person has engaged in the acts Steve mentions but has stopped them (and presumably repented and confessed these sins), he would be forgiven. We all have temptations of one kind or another and I imagine everyone reading this has at some point engaged in some kind of behavior forbidden by the Church. We’re fallible human beings, after all, and if we were perfect we wouldn’t need a Savior. God is always ready to forgive the penitent.
But definitely, anyone who has never even kissed or held hands with another person–much less engaged in intercourse–would most decidedly be a virgin.