It can be, in context. If referring to an individual bird, then it is a regular common noun. If it is talking about chicken meat, then this is an uncountable noun, there is no 'a chicken' when talking about chicken meat.
The noun chicken (the creature) is a countable noun; one chicken or a dozen chickens. The noun chicken (the food, a substance) is a mass (non-count) noun; units are expressed in pieces of chicken, parts of chicken, pounds of chicken, etc.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
The word 'violence' is an uncountable noun.
Yes, the noun 'hydrogen' is an uncountable noun, a word for a substance.
The noun 'health' is an uncountable noun, a word for a condition.
Yes, the noun 'mumps' is a plural, uncountable noun, a word for an infectious disease.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
The noun 'chicken' is a singular noun as a word for a type of bird. The plural noun is 'chickens'.The noun 'chicken' is an uncountable noun as a word for the meat of this type of bird, a word for a substance.The noun 'chicken' is a common gender noun, a word for a male or a female bird.The gender specific noun for a male chicken is 'rooster'.The gender specific noun for a female chicken is 'hen'.A noun functions as the subject of a sentence or a clause, and as the (direct or indirect) object of a verb or the object of a preposition.Example uses:Four chickens will be needed for the barbecue. (subject of the sentence, plural-countable)I found an egg in the nest that a chicken had laid. (subject of the relative clause, singular-countable)We made enough chicken for everyone. (direct object of the verb 'made', uncountable)They made the chickens a shelter. (indirect object of the verb 'made', plural-countable)We made the soup with leftover chicken. (object of the preposition 'with', uncountable)Note: The noun 'chicken' is also an informal word for a contest between people in which the first person to lose nerve and withdraw from a daring or dangerous situation or activity is the loser.The word 'chicken' is an informal adjective used to describe a person as timid or cowardly.
The noun 'rain' is a singular, uncountable (mass) noun as a word for water drops falling from clouds; a word for precipitation.The plural noun 'rains' is a plural, uncountable (mass) noun as a word specifically for seasons or periods of rain.
Yes, the word 'persistence' is an uncountable noun, a word for a quality or behavior.
The noun 'music' is an uncountable (mass) noun, a type of aggregate noun, a word representing an indefinite number of elements or parts.
Yes, the noun 'traffic' is an uncountable noun, an aggregate noun, a word representing an indefinite number of elements or parts.