Lost in (the loft) Space #2

This is a brilliant Omnific/Birdsall designed cover from 1974 (although I think this version may have been first printed in 1971). OK, perhaps the dictionary definition thing is a little cliché now but it wasn't back then. No, forget that; what I should have said was: perhaps the dictionary definition thing is a little cliché when someone else does it but in Birdsall's masterful hands it works beautifully, backing up the real star idea, the extracted S and I.

Oh, and of course, it is a dictionary.