[f. BORE v.2 + -ING2.] That annoys, wearies, or causes ennui. Hence Boringly adv.

1

1840.  T. Hook, Fitzherbert, III. iv. 66. Emily was patiently enduring … Miss Matthews’s boring vanities.

2

a. 1845.  Hood, Incend. Song, xiii. Burn all bores and boring topics.

3

1840.  T. Hook, in New Monthly Mag., LX. 429. Frank’s attempts to moralize, not tediously, boringly or cantingly.

4