(geology) the layer of the Earth's crust, at the top of the asthenosphere, where most earthquakes originate

The state of apparent weightlessness which occurs in a very low gravity field, or in free fall.

(informal, intransitive) To stop paying attention and think about something else, or to think about nothing

(surveying) An optimal network design within a computer. It involves choosing an optimal reference system and revolving it around a certain real number.

A region where war is ongoing. / A region where structures are damaged or in disarray, appearing similar to the effects of a military conflict.

plural of zero-point energy

An area within a port where goods may be temporarily stored without paying duty

(logic) Describing situations in which the veracity of a statement may be shown to be true without revealing any other information.

(cryptography) An interactive method for one party to prove to another that a (usually mathematical) statement is true, without revealing anything other than the veracity of the statement.

(ice hockey) From one team's point of view, the area between the blue line of the other team's half of the rink and the end board behind the other team's goal.