Mr Moon told the visiting top US military official that there must be a diplomatic solution to the crisis.
Gen Joseph Dunford said the US priority was diplomacy but he added that it was committed to defending the South against a possible military attack.
The North on Monday said any war could "only be turned into a nuclear war".
Also on Monday, China's commerce ministry issued an order banning a slew of imports from North Korea, in line with additional UN sanctions that were announced earlier this month.
The sanctions were introduced in response to a wave of missile tests and increased military rhetoric from North Korea.
In another development, Ukraine has denied supplying North Korea with rocket engines from one of its factories.
A report in the New York Times suggests that Soviet-era engines made at the Yuzhmash factory in Dnipro (the city known until recently as Dnipropetrovsk) were supplied to the North illegally.
Samsung has launched its Galaxy Note 10+ Star Wars special edition ahead of the December 20 release of Star Wars: The Rise of Skywalker.
Samsung Galaxy S11 is expected to launch early next year and This 2020 flagship would support 8K video recording.
According to the latest leak, Samsung Galaxy A91 may launch in India at the end of this year.
Vivo Y19 is currently available in offline stores across India at the starting price of Rs.13,990.
Realme X2 Pro will be launched on November 20 in India. Ahead of the launch, the company has announced the Blind Order sale of realme X2 Pro.
Samsung Galaxy A51, One of the most rumored smartphones is likely to be debut sometime in December 2019.
Realme 5s will launch in India on November 20 alongside Realme X2 Pro.
Amazon Mi days sale has started on November 14 and it will go till November 18. The offers and discounts are available in Mi online stores as well.
The new foldable phone- Motorola Razr(2019) was unveiled in Los Angeles. The Motorola Razr price starts at US $1,500.