IPA: /ɒˈstɛnsɪvli/
KK: /ɔˈstɛn.sɪv.li/
In a way that is clear and obvious, often used to show something directly or explicitly.
The teacher explained the concept ostensively, using examples that everyone could understand.
Ostensibly is formed from "ostendere" (meaning to show) and the suffix "-ly" (meaning in a manner). The word "ostensively" means in a manner that shows or demonstrates something clearly.
Think of 'showing' ('ostendere') something clearly — that's why 'ostensively' means to demonstrate in a clear manner.