What is the meaning of Ipse?

himself; herself; itself

himself, herself, itself, the very, the actual

specific reference to the chief, the leader, the one, etc., used to distinguish the principal person from the subordinates

in person

for one's part, for his part, for her part

alone, by oneself, by one's own accord, of one's own nature

just (with an adverb of time)

exactly, precisely, just (with a numeral or for contrast)

Source: wiktionary.org