What does "subterfuge" mean?

Subterfuge: That to which one resorts for escape or concealment; an artifice employed to escape censure or the force of an argument, or to justify opinions or conduct; a shift; an evasion. Affect not little shifts and subterfuges, to avoid the force of an argument. I. Watts. By a miserable subterfuge, they hope to render this position safe by rendering it nugatory. Burke.