Siege

n. 1 surrounding and blockading of a town, castle, etc. 2 similar operation by police etc. to force an armed person out of a building. r : lay siege to conduct the siege of. raise the siege of abandon, or cause the abandonment of, an attempted siege of. [French sege seat] siemens psi:manzi n. SI unit of conduct ance, equal to one reciprocal ohm. [von Siemens, name of an engineer]