A party held on a lawn or in a park, usually more formal than a picnic or barbecue.

(informal) A dilapidated area of a city where many people live in a state of poverty and in which crime is more common than in other portions of the city.

(dated) A social gathering of men only.

(anthropology) The child of one's father's brother or of one's mother's sister; a cousin related via same-gender siblings rather than opposite-gender ones (the latter being a cross-cousin).

(quantum mechanics) A surprising result of applying the Dirac equation to the problem of electron scattering from a potential barrier. In non-relativistic quantum mechanics, electron tunnelling into a barrier is observed, with exponential damping. However, if the potential is of the order of the electron mass, V∼mc², the barrier is nearly transparent; moreover, as the potential approaches infinity, the reflection diminishes and the electron is always transmitted.

a type of shopping centre usually built on the outskirts of a town or city, typically containing a number of retail outlets such as chain stores.

(Internet, historical) An informal private party held as part of a convention, giving Internet users the chance to meet in person.

The linguistic paradox that, if there are unnameable things, their existence cannot be indicated without naming them in some way.

(law) The plaintiff in a lawsuit. / (informal) The victim in a situation, the person treated unfairly.

(economics) The apparent paradox that a rent seeker wanting political favours can bribe politicians at a cost much lower than the value of the favour to the rent seeker.