This word must be preceded by the definite article in the sense shown in 2a). This word must begin with a capital letter in the senses shown in 3), 4), and 5).
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).