<p><strong>Noun</strong></p><ul><li>the spatial dimensions, proportions, magnitude, or bulk of anything: the size of a farm; the size of the fish you caught.</li><li>considerable or great magnitude: to seek size rather than quality.</li><li>one of a series of graduated measures for articles of manufacture or trade: children's sizes of shoes.</li><li>extent; amount; scope: a fortune of great size.</li><li>actual condition, circumstance, or state of affairs: That's about the size of it.</li><li>a number of population or contents: What size is Springfield, Illinois? The size of that last shipment was only a dozen.</li><li>Obsolete: a fixed standard of quality or quantity, as for food or drink.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to separate or sort according to size.</li><li>to make of a certain size.</li><li>Metallurgy: to press (a sintered compact) to close tolerances.</li><li>Obsolete: to regulate or control according to a fixed standard.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>Informal: to form an estimate of (a situation, person, etc.); judge: They sized him up with a look.</li><li>to meet a certain standard: He doesn't size up to my expectations.</li></ul>