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1. also in·gres·sion (ĭn-grĕsh′ən) 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 Indo-European roots.]
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The state of being allowed entry:
References in periodicals archive ?
Polyurethane U-cup seals and umbrella-style wipers provide a more robust sealing package to minimize contaminate ingression into the cylinder.
He further establishes a chronological built up of various 'waves of migration' starting from the post-independence Mohajir arrival to that of Pakhtuns and Punjabis from the 60s through to the 80s; the two major inflows of Sindhis first in the 70s and then in the 90s, furthered by ingression of Iranians and that of Afghans during Afghan war which spanned over the 80s and the 90s; the most significant being an overwhelmingly large number of political refugees from Afghanistan.
They are distinguished by the fact that they can be many places at many times or, as the term "eternal object" implies, they are pure potentials available for ingression in the temporal process.
The nano particles were kept in a desiccator to avoid moisture ingression.
Tectonic movements that caused the regional tilting of an investigated area and supported minor marine ingression and influx of fresh water played an important role in formation of the sediments.
IP65-rated for dust and water ingression, the device also features a rear-facing, 8 megapixel camera with auto focus and LED flash.
This finding raised the possibility that these bundled astral microtubules serve as miniature central spindles, thus overcoming the great distances between the cell surface and the central spindle during the early phases of furrow ingression.
Therefore, political ingression in the workings of the free market will have a role in determining the actual level of economic integration, but the fact remains that political and economic integration are two distinct phenomena.
A limited Pliocene marine ingression followed, which quickly turned into continental facies inter-fingering with basalts in the Tripoli-Hums area and parts of coastal Syria.
The addition of a hydrogen scavenging/absorbing gel is used within the St/St Tube to prevent the potential darkening of the optical fibres due to the natural ingression of small amounts of hydrogen which are present in these extreme conditions.
If "eternal objects" ingress, then a parallel ingression of evil is certainly reasonable qua infernal objects (or events) depicted in the figurative and symbolic language of Genesis as the Temptation, the Fall, and Original Sin.
The initial sign of the marine ingression into the central Great Belt area is dated to 8100 cal.