@dalehileman,
dalehileman wrote:maybe you meant infinitive instead of indefinite
An indefinite tense (whether "perfect," "past," etc.) is a tense which does not specify whether it is referring to an action or state that stopped at some time or is one that is still continuing - it is not known, hence, unspecified or indefinite.
The perfect indefinite tense is used:
1. About action completely past, and often at no great distance, but the time not specified: I have accomplished my plan; he has eaten his breakfast.
2. About continued or repeated action commencing in the past: my father has lived about eighty years; the queen has reigned more than sixty years; he has often been heard to lament.
3. When a specified past time is represented, if that time is expressed as part of the present period: we have been together today; his brother has visited him once in two years; she has not seen her sister since the year 2008.
See e.g. the Oxford English Dictionary:
"Indefinite .... 3. Grammar .... b. Applied to those tenses or inflexions of verbs which merely denote an action taking place at some time (past, present, or future), without specifying whether it is continuous or complete"