Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

"to slope, overturn," c.1300, possibly from Scandinavian, or a special use of tip (n.). Intransitive sense of "fall over" is recorded from 1520s. Related: Tipped; tipping. Tipping point attested by 1972.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.