In the SNAr reaction of an activated aryl halide, the anionic intermediate in which the ring carbon bearing the halogen has become $s{p}^3$ hybridised is called

In SNAr the nucleophile adds to the carbon carrying the leaving group, giving a resonance-stabilised cyclohexadienyl anion. This anion is the Meisenheimer complex. The arenium ion is the cationic intermediate of electrophilic substitution, and benzyne and the phenyl cation belong to other pathways. The answer is the Meisenheimer complex.