The Scofield Bible Commentary, by Cyrus Ingerson Scofield, , at sacred-texts.com
without form and void
Compare (Gen 1:2).
"Without form and void" describes the condition of the earth as the result of judgment; (Jer 4:24-26); (Isa 24:1) which overthrew the primal order of (Gen 1:1).
(See Scofield) - (Zac 8:14).