(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.

(idiomatic) Insanity or craziness.

(UK) Wealth earned in one generation seldom lasts through the third (grandchild's) generation.

(computing, information technology, translation studies) If input data are not complete, accurate, and timely, then the resulting output is unreliable and of no useful value.

An exclamation of surprise.

In the middle of. Amidst. Amongst.

Describing a helicopter's shrouded tail rotor, essentially a ducted fan, intended to counteract the torque of the main rotor.

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.

present participle of hem in

Roughly; approximately; generally; without going into details. / In a large quantity or sum; without division or particulars; by wholesale.