[UNDER-1 4 a + LINE v.1] trans. To furnish with an underlining; to form an underlining to. Also fig.
1545. Raynald, Byrth Mankynde, 8. This ryme vnderlyneth all the hole cauyte, or amplytude of the belly.
a. 1639. Wotton, Reliq. (1651), 86. By a meer chance, in appearance, though under-lined with a providence, they had a full sight of the Queen Infanta.
1834. Wrangham, Homerics, 9. So quick his raft Ulysses made; And floord the deck, by spars combined, And with long battens under-lined.