Abbas also met with US President Trump's worldwide envoy Jason Greenblatt, who he also met earlier this month in Ramallah on prospects of reviving Israeli-Palestinian peace talks. Trump has said he would move the U.S. Embassy in Israel to Jerusalem, but relocation no longer appears imminent.
On the sidelines of the summit, Greenblatt held talks with the foreign ministers of Jordan, Egypt and Qatar, as well as Palestinian President Mahmoud Abbas.
The gathering, hosted by Jordan, drew leaders from 21 Arab countries.
Furthermore, Abbas is supposed to travel to Washington in April and have personal meetings with President Donald Trump regarding the Israel-Palestine conflict.
"Arab and Muslim countries must unite their efforts to combat terrorism", Abdullah said in his address.
An Arab peace initiative dating back to 2002 has offered normalised relations with Israel in exchange for resolving the decades-old Israeli-Palestinian conflict.
Intelligence Minister Israel Katz says the Palestinian issue should not be ignored.
The 22-member bloc has struggled to resolve any of the conflicts that started after the 2011 Arab Spring uprisings, including Syria's devastating six-year war.
He pointed to his country's interests in development issues and economic cooperation among the Arab countries, and the importance of activating all decisions aimed at promoting joint Arab action in the economic field.
They also warned against moving diplomatic missions to contested Jerusalem, whose eastern sector is sought by the Palestinians as a capital.
On Yemen, regional powerhouse Saudi Arabia will be looking for more support for the coalition it launched two years ago to intervene in support of government forces against Iran-backed Shiite rebels.
III ban: Auto stocks fall up to 3% after Supreme Court order
They now will have to offer steep discounts, ship products to BS-III export markets or invest to upgrade their products to BS-IV. Auto market leader Maruti Suzuki is least affected by the order and has been making BS-IV vehicles since 2010.
Abed Rabbo Mansour Hadi told an Arab summit in Jordan on Wednesday that Iran "is the true sponsor of terrorism". The fighting pits Hadi's troops, backed by a Saudi-led global military coalition of mostly Arab states, against Shiite Houthi rebels, led by Abdul-Malek al-Houthi and backed by former President Ali Abdullah Saleh and his forces.
The conflict has killed more than 10,000 civilians, displaced over three million people and pushed the impoverished country to the brink of starvation.
A photo handout by the Egyptian delegation showed the two leaders sitting next to each other in white cushion chairs. The two countries had disagreed over Syria and the transfer of two Red Sea islands from Egypt to Saudi Arabia.
In October, the Saudis abruptly suspended oil aid to Egypt just days after Cairo backed a U.N. Security Council resolution on Syria drafted by Assad's ally Russian Federation.
The Saudis cut off oil shipments to Egypt in October, apparently in connection with disagreements on Yemen and Syria, though the shipments resumed this month.
The last Arab summit was hosted by Mauritania past year.
Trump hasn't yet formulated a policy on the Israeli-Palestinian conflict, but has suggested the internationally backed idea of a two-state solution isn't the only option on the table.
"The two-state solution is the only path to ensure that Palestinians and Israelis can realize their national aspirations and live in peace, security and dignity", UN Secretary General Antonio Guterres said at the ongoing 28th Arab Summit in Jordan.
The Al-Aqsa Mosque compound, known to Jews as the Temple Mount, has been a scene of frequent Israeli-Palestinian tensions, including clashes.
Arab leaders attending a one-day summit beside the Dead Sea did not publicly refer to Trump or his ambiguous statements, but were keen to stress their own continued backing for an independent Palestinian state and also strongly criticised the persistent building of Jewish settlements on occupied territory.