To ‘mount’ (the skies): to ascend or climb up into (heaven). Often allusive.

transitive. To rise towards (something). Obsolete. rare.

transitive. To mount up to, soar to, reach, attain. Also figurative. Obsolete.

To mount upon. Obsolete. rare.

transitive. To get on to or into (a vehicle or a part of a vehicle). Also intransitive.

To go up into or get up on (a place or object at a higher level); to mount. Obsolete exc. poetic, and in the phrase, now hardly more than figurative…

transitive. To ascend, to mount into. Obsolete. rare.