mountain (part of speech: noun)
- On the same side of the river, but much higher up, where the Douro forces its way between two lofty cliffs, on the summit of the southern one, stands the once very celebrated convent of the Sierra.
- As the day drew to a close, the cannonade slackened on either side, a solitary gun would be heard at intervals, and in the calm stillness around, its booming thunder re- echoed along the valleys of the Sierra; but as the moon rose and night set in, these were no longer heard, and a perfect stillness and tranquillity prevailed around. - "Charles O'Malley, The Irish Dragoon, Volume 2 (of 2)", Charles Lever.
- The man gave him many useful suggestions for the last lap of the journey and he decided to go after Courant, to whom the route over the Sierra was unknown ground. - "The Emigrant Trail", Geraldine Bonner.