Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun u

3 senses of u

Sense 1
uracil, U -- (a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine)
       => nucleotide, base -- (a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA))

Sense 2
uranium, U, atomic number 92 -- (a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons)
       => metallic element, metal -- (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Sense 3
U, u -- (the 21st letter of the Roman alphabet)
       => letter, letter of the alphabet, alphabetic character -- (the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters")

Antonyms of adj u

1 sense of u

Sense 1
u -- ((chiefly British) of or appropriate to the upper classes especially in language use)

INDIRECT (VIA middle-class, upper-class) -> lower-class, low-class -- (occupying the lowest socioeconomic position in a society)
INDIRECT (VIA upper-class, lower-class) -> middle-class -- (occupying a socioeconomic position intermediate between those of the lower classes and the wealthy)

Similarity of adj u

1 sense of u

Sense 1
u -- ((chiefly British) of or appropriate to the upper classes especially in language use)
       => upper-class (vs. lower-class) (vs. middle-class) -- (occupying the highest socioeconomic position in a society)