Definitions
1.VerbTo meet (someone) or find (something), especially unexpectedly.
2.VerbTo confront (someone or something) face to face.
3.VerbTo meet one another.
4.VerbTo engage in conflict, as with an enemy."Three armies encountered at Waterloo."
5.VerbTo kill or execute someone extrajudicially.
6.NounA meeting, especially one that is unplanned or unexpected."Their encounter was a matter of chance."
7.NounA hostile, often violent meeting; a confrontation, skirmish, or clash, as between combatants.
8.NounA match between two opposing sides.
9.NounA sexual encounter; sexual activity, especially unplanned or unexpected, between two people who have not already established a sexual relationship with each other. In many cases, it does not lead to a relationship, and thus is utterly transient. A sexual encounter can be consensual or non-consensual; in the latter case, it is known as sexual assault. A consensual sexual encounter that happens only once is commonly known as a one-night stand.
10.NounThe period of a space mission during which it carries out its data-gathering objectives.
11.NounAn extrajudicial killing or execution.