What does "ostension" mean?

The act of presenting an ostensive definition.

Ostension

noun

noun ·Rare ·Advanced level

Noun

1
The act of presenting an ostensive definition. countable, uncountable
"And ostension is one perfectly familiar way of introducing a concept."
2
An act of showing or demonstrating. countable, uncountable
3
The showing of the sacrament on the altar in order that it may receive the adoration of the communicants. countable, uncountable
4
Real-life events that parallel well-known events from myth and folklore countable, uncountable

"And ostension is one perfectly familiar way of introducing a concept."

Borrowed from Middle French ostension, in turn from Latin ostensiō, ostensiōnem.