(genetics) A person who is on a family tree because he has married someone on the tree, and is not related by blood to anyone on the tree except his own descendants.

(grammar) The English infinitive verb form when introduced by the particle to.

(archaic) Ultimately, in the end; in conclusion.

Pay attention to the new way of living; go within yourself, take drugs; abandon the established ways and stop conforming.

(slang) A big setback or disappointment.

plural of thing-in-itself

(humorous) Indicates the speaker has noticed an erection underneath the interlocutor's clothes.

A question used to ask for a restaurant menu in the English language

To eat a meal at home. / (UK) To eat a purchased meal on the premises where one bought it, rather than taking it away. / (of acid) To etch or erode a substance.

(idiomatic) To deliberately ignore the reality of a situation; to pretend a problem does not exist.