number two noun 9adjective 1forms 1 noun9 •A primary assistant; vice-leader.After she had shown great promise over the last 10 years, he made her his number two. •(informal, euphemistic) Feces; the act of defecation.I need to go number two. •(slang) A first mate. •A pencil with hardness level 2.I reach into my bag, pull out my pencil case, and offer Jason one of my fully sharpened number twos. — 2012 •A backup player, especially a goalkeeper. •A right back.I came down here to cement the number two position, the right back role and I’ve not really managed to do that. — 2015 •The batsman who opens alongside the number one, but does not face the first delivery. •(Philippines, informal) mistress (the other woman in an extramarital relationship, generally including sexual relations) •A somewhat small town, between a number one and a number three, where the success of a theatrical performance is unlikely to be very great. adjective1 •(US) White, Caucasian. formsnumber twos