Sei

//seɪ// name, noun

name, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A sei whale.

    "Seis also feed by engulfing small schooling fish."

  2. 2
    Initialism of solid electrolyte interphase abbreviation, alt-of, initialism, uncountable
Proper Noun
  1. 1
    Initialism of Supporting Effective Instruction. US, abbreviation, alt-of, initialism

    "“The Budget proposes eliminating Supporting Effective Instruction (SEI) State Grants (Title II State grants), a program that provides formula funds to States to improve the quality and effectiveness of teachers, principals, and other schools leaders. SEI grants are poorly targeted and funds are spread too thinly to have a meaningful impact on student outcomes."

Example

More examples

"Seis also feed by engulfing small schooling fish."

Etymology

From sei whale, from Norwegian seihval, seikval, from sei (“pollock”) + hval (“whale”). Doublet of saithe.

Related phrases

sei whale

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.