Definition of "infiltrate"

(transitive, intransitive) To surreptitiously penetrate, enter or gain access to.  examples

(transitive) To cause to penetrate in this way.  examples

(transitive, intransitive, of a liquid) To pass through something by filtration.  examples

(transitive) To cause (a liquid) to pass through something by filtration.  examples

(transitive, intransitive, medicine) To invade or penetrate a tissue or organ.  examples

(transitive, military) To send (soldiers, spies, etc.) through gaps in the enemy line.

(intransitive, of an intravenous needle) To move from a vein, remaining in the body.  examples

(pathology) Any undesirable substance or group of cells that has made its way into part of the body.  quotations