Udhiyah: The same meaning as Qurbaan.
Ulama: Learned men.
Umm al-Mu'minin: The mothers of the believers - title given to the wives of the Prophet Muhammad (peace be upon him) because they are regarded as the mothers of all believers.
Ummah: Refers to the whole Muslim community, irrespective of colour, race, language or nationality.
Ummul mu'mineen: Mother of the faithful.
Umrah: Lesser pilgrimage to Makkah , performed at any time of the year.
Umrah al-Qada: The fulfilled 'Umrah - the 'Umrah which the Prophet performed in the seventh year after Hijrah which he intended to do in the sixth year but the Quraysh unbelievers had not allowed him to complete.
Uroodut-Tijaarah: Trade merchandise.
Ushr: Ten percent (in some cases five percent) of the agricultural produce payable by a Muslim as part of his religious obligation, like zakaat, mainly for the benefit of the poor and the needy.
Uzza: One of the major idols in pre-Islamic Arabia.
Copied from 'THE ISLAMIC SCHOLAR'