Antonyms of adj preadolescent

1 sense of preadolescent

Sense 1
preteen, preadolescent -- (of or relating to or designed for children between the ages of 9 and 12; "a preteen party"; "preteen clothing")

INDIRECT (VIA young) -> old -- ((used especially of persons) having lived for a relatively long time or attained a specific age; "his mother is very old"; "a ripe old age"; "how old are you?")

Similarity of adj preadolescent

1 sense of preadolescent

Sense 1
preteen, preadolescent -- (of or relating to or designed for children between the ages of 9 and 12; "a preteen party"; "preteen clothing")
       => young (vs. old), immature -- ((used of living things especially persons) in an early period of life or development or growth; "young people")