- 1not confident about yourself or your relationships with other people He's very insecure about his appearance. She felt nervous and insecure.
- 2not safe or protected Jobs nowadays are much more insecure than they were ten years ago. As an artist, he was always financially insecure. Insecure doors and windows (= for example, without good locks) make life easy for burglars. opposite secure
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NAmE//ˌɪnsɪˈkyʊrət̮i//noun (pl. insecurities) [uncountable, countable] feelings of insecurity job insecurity We all have our fears and insecurities. The incident brought back childhood insecurities.