As an example the "feed the mind" card says:
You or another investigator within range become focused. Then flip this card.
It does not define in the rulebook what becoming "focused" means.
Another example is while performing an attack the text indicates that if you fail you become dazed.
Again the rulebook did not define what being "dazed" means.
Thanks for your responses and help.
As others have pointed out, those terms are defined on the conditions cards. There are cards clearly labeled "focused," "dazed," "stunned," etc. There are about 5 copies of each condition card. Find them in your decks. They're probably mixed in with your spell cards or something.