# arming

/ˈɑɹmɪŋ/ (US) · /ˈɑːmɪŋ/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/arming
Updated: 2026-05-08

## Definition

a sticky substance, like fat or wax, put on the bottom of a heavy tool used to measure the depth of the sea. It picks up sand or shells from the ocean floor so sailors can see what the bottom looks like.

For teachers: the application of tallow or a similar adhesive substance to the cavity at the base of a sounding lead. This process allows for the retrieval of bottom samples, such as sand or gravel, to assist in maritime navigation and position-fixing.

## Examples

- The sailor checked the arming to see if the seabed was sandy.
- Before dropping the lead into the dark water, the crew applied fresh arming to ensure a clear sample of the bottom.
- By examining the particles stuck to the arming, the navigator confirmed they were passing over the shingle bank described in the coastal charts, despite the thick fog obscuring the shore.

## Usage notes

- Primarily used in a nautical context; refers to the substance itself or the act of applying it.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.