n. 1. also in·gres·sion (ĭn-grĕshən) A going in or entering. 2. Right or permission to enter. 3. A means or place of entering. [Middle English ingresse, from Latin ingressus, from past participle of ingredī, to enter : in-, in; see IN-2 + gradī, to step; see ghredh- in the Appendix of Indo-European roots.] |
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