(modal) Seemingly, apparently, on the surface.

Apparent, evident; meant for open display. / Appearing as such; being such in appearance; professed, supposed (rather than demonstrably true or real).

Apparently true, but not necessarily; ostensible / Clearly demonstrative.

(philosophy) The act of presenting an ostensive definition. / (obsolete) An act of showing or demonstrating.

(manner) In an ostensive manner. / (modal) Ostensibly.

plural of ostension

The quality of being ostensible.

(semantics) A process of binding the meaning to the defined term by pointing out examples and counterexamples.

plural of ostensive definition