plural of oth

Obsolete spelling of oath

Used to form plurals of some Hebrew loanwords ending in -a or -ah.

Initialism of over the horizon: a form of radar that can detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon.

(politics) Abbreviation of other. / (advertising) Initialism of opportunity to hear.

Initialism of over-the-horizon backscatter (“a form of radar”).