This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 曫 is uncertain. It combines 䜌 (a complex component possibly related to binding or disorder) with 日 (sun), but the original meaning and formation are unclear.
The top 䜌 looks like tangled threads or speech, and the bottom 日 is the sun. Picture a confusing sunset where the sun's light gets tangled in clouds, creating a dim, uncertain twilight.
For ラン, imagine a lantern glowing in the twilight: lantern -> ラン, and the tangled sunset scene needs a lantern to see clearly.