| INF | the area of a baseball field that is enclosed by 3 bases and home plate |
|---|---|
| INF | (baseball or softball) a person who plays a position in the infield |
| INF | pass through an enemy-line |
| INF | pass into or through by filtering or permeating |
| INF | cause (a liquid) to enter by penetrating the interstices |
| INF | enter a group or organization in order to spy on the members |
| INF | a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection) |
| INF | the slow passage of a liquid through a filtering medium |
| INF | an intruder (as troops) with hostile intent |
| INF | someone who takes up a position surreptitiously for the purpose of espionage |
| INF | total and all-embracing |
| INF | too numerous to be counted |