introverted

adj.
Marked by interest in or preoccupation with oneself or one's own thoughts as opposed to others or the environment; shy or reserved.

Note: click on a word meaning below to see its connections and related words.

The adjective has 2 meanings:

Meaning #1: examining own sensory and perceptual experiences
  Synonym: introspective

Meaning #2: characterized by introversion
  Synonyms: introvert, introvertive

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