▪ I.metrically,adv.1 see metrical a.1 ▪ II.ˈmetrically,adv.2 [f. metrical a.2 + -ly2.] In or with the metric system. 1969Daily Tel. 5 Sept. 25/2 A builder of iron and steel plants has found his design time reduced by 15 per cent. when working metrically.