adv. Obs. rare1. [f. ME. þonne, THEN + -liche, -LY2. (The modern form, if the word had survived, would be thenly.)] In that case: = THEN 4.
1340. Ayenb., 31. Kueade anginnynge heþ þe sleuuolle be zix zennes. Þe uerste is þonneliche huanne þe man loueþ lite and lheucliche oure lhord.