This is the 522nd most frequent Finnish word.
meitä
"Meitä" means "us" or "of us" in English.
Here, 'meitä', a personal pronoun, is used in partitive plural to indicate 'us' as a part of a group of people whose total number is five.
Meitä on täällä viisi.
There are five of us here.
'Meitä' acts as the object in this sentence, emphasizing the receiving end of the action of not waiting.
He eivät odottaneet meitä.
They did not wait for us.
In this sentence, 'meitä' is used impersonally in partitive plural to express an interest attributable to 'us' in nature.