As1  —adv. & conj. (adv. As antecedent in main sentence; conj. In relative clause expressed or implied) to the extent to which … is or does etc. (am as tall as he; am as tall as he is; (colloq.) Am as tall as him; as recently as last week). —conj. (with relative clause expressed or implied) 1 (with antecedent so) expressing result or purpose (came early so as to meet us). 2 (with antecedent adverb omitted) although (good as it is = although it is good). 3 (without antecedent adverb) a in the manner in which (do as you like; rose as one man). B in the capacity or form of (i speak as your friend; olivier as hamlet). C while (arrived as i was eating). D since, seeing that (as you are here, we can talk). E for instance (cathedral cities, as york). —rel. Pron.