auxiliary cruiser

(military, nautical) An armed merchantman, typically used as a commerce raider or as a convoy escort.

Japanese Meaning

補助巡洋艦：民間商船を武装改造して戦闘任務（遊撃、護衛、商船襲撃など）に用いる艦船

The auxiliary cruiser slipped through the blockade under the cover of night, carrying vital supplies to the besieged port.

武装商船は夜の覆いの下で封鎖線をくぐり抜け、包囲された港に重要な物資を運んだ。

Sense（1）

(military, nautical) An armed merchantman, typically used as a commerce raider or as a convoy escort.

auxiliary cruisers

（ plural ）