sizing

1. To adjust the size of; to make a certain size.
2. To classify or arrange by size.
3. To approximate the dimensions, estimate the size of.
4. To take a greater size; to increase in size.
5. (Cambridge University) To order food or drink from the buttery; hence, to enter a score, as upon the buttery book.
6. To swell; to increase the bulk of.

verb

To apply glue or other primer to a surface which is to be painted.

1. A gelatinous glue for glazing or sizing canvas, paper, plaster or wood; often made from animal skins.
2. Paste
3. (Cambridge University) food and drink ordered from the buttery by a student
4. A weak glue used in various trades; size.