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"Perfecto" is an adjective which is often translated as "perfect", and "imperfecto" is an adjective which is often translated as "imperfect". Learn more about the difference between "perfecto" and "imperfecto" below.
perfecto(
pehr
-
fehk
-
toh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (flawless)
2. (ideal)
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
imperfecto(
eem
-
pehr
-
fehk
-
toh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
3. (grammar)
a. imperfect 
El imperfecto de "comer" es "comía".The imperfect of the Spanish verb "comer" is "comía."
b. imperfect tense 
El imperfecto se usa para hablar de acciones pasadas habituales.The imperfect tense is used to talk about habitual actions in the past.