The thesis offers a new theoretical and methodological approach to the reconstruction of the concept HUMAN AGE in the minds of Ukrainian, Russian and English native speakers. A new complex method for analyzing the linguocultural concept HUMAN AGE as an archetypical and stereotypical mental formation has been proposed. The archetypical basis of the concept has been determined by considering the etymology of the concept names and nominations of age stages and persons by age in the three languages. There have been established 12 essential conceptual signs of the concept key nominations, which form the archetypical basis of its formation in the minds of Ukrainian, Russian and English native speakers: "human", "body", "strength", "life", "natural time", "natural space", "moving around", "moving along", "making no move" ("stopping at a place"), "physical action of a person", "physical condition of a person", "the social status of a man". The stages of stereotyping of axiological and notional / figurative / evaluative images of the concept HUMAN AGE in the minds of Ukrainian, Russian and English native speakers have been revealed. The most complete set of archetypical and symbolic features, sociocultural age stereotypes, numerological, coloristic, phytomorphic and zoomorphic metaphorization of age stages and persons by age nominations has been identified. The similarities and differences in the mapping of archetypical and stereotypical images of the concept HUMAN AGE in the minds of Ukrainian, Russian and English native speakers have been characterized. There has been recognized a certain genetic similarity among the Ukrainian, Russian and English lexemes naming the HUMAN AGE, viz. the prototypical structure of it defined as experiences of the cyclic-linear course of time (the circling and moving along the straight line) and the expansion of the semantics of the Ukrainian, Russian and English lexemes that verbalize the concept HUMAN AGE by reframing it, based on a naturmorphic archetypal metaphor. These features have been identified as belonging to the archetype of the ANIMAL and the TREE of LIFE (FLOWER). There has been reconstructed other archetypes: in particular, physical (Light / Darkness, Colored / White), spatial (Top / Bottom, Right / Left, Center / Periphery), biological (Young / Old, Healthy / Sick, Strong / Weak), etc. There has been determined the symbolic basis of the HUMAN AGE nominations that are images of animals (totems), natural phenomena / forces, landscapes, physical processes / states of a person / animal, types of food, kinds of drinks, items of clothing, agricultural tools, weapon, (semi-)precious metals, colors (red, green, yellow, etc.), numerology (numbers 3, 4, etc.), relics of Slavic pagan beliefs (God Rod, Roshanytsi, Yarilo, etc.), the Christian (Bozych, Christ, etc.), mythological images (Aevum, Cronos / Chronos, Senectus, etc.) and motives (weaving on a spindle, the creation of the Universe). The most typical mental and cultural archetypical and symbolic images; neutral, positive and negative stereotypes / stereotypical oppositions have been revealed in the phraseological and paremiological systems of the three languages and defined that their content comprises the axiological and evaluative component of the concept: a set of verbalized role models, norms, values as fixed in the society for females and males of different age groups, and got developed in various figurative situational interpretations due to the unique habitats and specific historical development of the Ukrainian, Russian and English ethnoses: "the old are physically weak / strong"; "the young are active and strong, but inexperienced / and intelligent"; "it is natural for women to conceal their age", etc.