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"La muerte" is a form of "muerte", a noun which is often translated as "death". "La vida" is a form of "vida", a noun which is often translated as "life". Learn more about the difference between "la muerte" and "la vida" below.
la muerte(
mwehr
-
teh
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
2. (homicide)
a. murder 
La muerte del presidente a manos de un psicópata fue un duro golpe para el país.The murder of the president at the hands of a psychopath was a severe blow for the country.
b. killing 
La policía investiga la brutal muerte de un turista en el centro de la ciudad.Police are investigating the brutal killing of a tourist in the city center.
3. (figurative) (end)
A phrase used as a figure of speech or a word that is symbolic in meaning; metaphorical (e.g., carrot, bean).
la vida(
bee
-
dah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (existence)
a. life 
Quiero que mi vida esté llena de aventura y amor.I want my life to be filled with adventure and love.
2. (livelihood)
a. living 
Ellos se ganan la vida escribiendo un diccionario.They make a living writing a dictionary.
3. (vitality)
a. life 
Era una persona muy activa y siempre llena de vida.She was a very active person and always full of life.
4. (lifetime)
a. life span 
La vida de una mariposa puede ser de una semana.The life span of a butterfly can be one week.