This is the 858th most frequent Finnish word.
korkea
"High" or "tall."
In this sentence, 'korkea' metaphorically refers to a high level of temperature.
Lämpötila on ollut korkea koko päivän.
The temperature has been high all day.
Here, 'korkeat' is used idiomatically to describe ambitious goals, retaining its grammatical attribute of plurality.
Uusi presidentti asetti korkeat tavoitteet.
The new president set high goals.
The word 'korkea' is used to describe the physical height of the tower.