The act of entering. / Permission to enter. / A door or other means of entering. / (astronomy) The entrance of the Moon into the shadow of the Earth in eclipses, or the Sun's entrance into a sign, etc.

(intransitive) To intrude or insert oneself / (transitive, US, chiefly military) To enter (a specified location or area) / (intransitive, astrology, of a planet) To enter into a zodiacal sign

Making an ingress or ingression; entering

present participle of ingress

plural of ingress

The act or process of entering or intruding. / (metaphysics) The process by which a potentiality enters into actuality. / (biology) The inward migration of cells from the blastula during gastrulation.

plural of ingression

plural of ingressive

Going or directed inward, entering. / Open to entry or examination. / (phonetics, of a speech sound) Uttered by drawing air inward through the mouth or nose.

(phonetics) A speech sound in which the air stream is created by drawing air in through the mouth or nose.