Having a false look of truth or genuineness; misleadingly attractive. The specious argument seemed convincing at first, but it fell apart under scrutiny.
Superficially plausible, but actually wrong. The specious reasoning in the report led to incorrect conclusions.
Pleasing to the eye; superficially attractive or fair in appearance (now chiefly archaic). The mansion's specious exterior concealed decades of neglect within.
Archaic. Pleasing or attractive in appearance. The chronicles spoke of a specious palace shining above the river.