Inciting or causing people to rebel against the authority of a state or monarch.
Late Middle English: from Old French seditieux or Latin seditiosus, from seditio ‘mutinous separation’ (see sedition).
“He read the letter and instantly declared it seditious!”
With regard to, or at the level of, orders in a taxonomic system; according to an ordinal number, system, etc.; on an ordinal scale; with regard to order.
Mid 19th century; earliest use found in The Edinburgh Review. From ordinal + -ly.